<< Chapter < Page Chapter >> Page >

The English words quotient and ratio are often used to describe fractions. Remember that “quotient” means division . The quotient of a and b is the result we get from dividing a by b , or a b .

Translate the English phrase into an algebraic expression: the quotient of the difference of m and n , and p .

Solution

We are looking for the quotient of the difference of m and n , and p . This means we want to divide the difference of m and n by p .

m n p
Got questions? Get instant answers now!
Got questions? Get instant answers now!

Translate the English phrase into an algebraic expression: the quotient of the difference of a and b , and cd .

a b c d

Got questions? Get instant answers now!

Translate the English phrase into an algebraic expression: the quotient of the sum of p and q , and r

p + q r

Got questions? Get instant answers now!

Key concepts

  • Equivalent Fractions Property: If a , b , c are numbers where b 0 , c 0 , then
    a b = a · c b · c and a · c b · c = a b .
  • Fraction Division: If a , b , c and d are numbers where b 0 , c 0 , and d 0 , then a b ÷ c d = a b · d c . To divide fractions, multiply the first fraction by the reciprocal of the second.
  • Fraction Multiplication: If a , b , c and d are numbers where b 0 , and d 0 , then a b · c d = a c b d . To multiply fractions, multiply the numerators and multiply the denominators.
  • Placement of Negative Sign in a Fraction: For any positive numbers a and b , a b = a b = a b .
  • Property of One: a a = 1 ; Any number, except zero, divided by itself is one.
  • Simplify a Fraction
    1. Rewrite the numerator and denominator to show the common factors. If needed, factor the numerator and denominator into prime numbers first.
    2. Simplify using the equivalent fractions property by dividing out common factors.
    3. Multiply any remaining factors.
  • Simplify an Expression with a Fraction Bar
    1. Simplify the expression in the numerator. Simplify the expression in the denominator.
    2. Simplify the fraction.

Practice makes perfect

Find Equivalent Fractions

In the following exercises, find three fractions equivalent to the given fraction. Show your work, using figures or algebra.

3 8

6 16 , 9 24 , 12 32 answers may vary

Got questions? Get instant answers now!

5 9

10 18 , 15 27 , 20 36 answers may vary

Got questions? Get instant answers now!

Simplify Fractions

In the following exercises, simplify.

Multiply Fractions

In the following exercises, multiply.

( 14 15 ) ( 9 20 )

21 50

Got questions? Get instant answers now!

( 63 84 ) ( 44 90 )

11 30

Got questions? Get instant answers now!

( 63 60 ) ( 40 88 )

Got questions? Get instant answers now!

Divide Fractions

In the following exercises, divide.

7 9 ÷ ( 7 4 )

1

Got questions? Get instant answers now!

5 18 ÷ ( 15 24 )

4 9

Got questions? Get instant answers now!

8 u 15 ÷ 12 v 25

10 u 9 v

Got questions? Get instant answers now!

3 4 ÷ ( −12 )

1 16

Got questions? Get instant answers now!

In the following exercises, simplify.

Simplify Expressions Written with a Fraction Bar

In the following exercises, simplify.

8 · 3 + 2 · 9 14 + 3

2 8 17

Got questions? Get instant answers now!

9 · 6 4 · 7 22 + 3

Got questions? Get instant answers now!

5 · 6 3 · 4 4 · 5 2 · 3

3 5

Got questions? Get instant answers now!

8 · 9 7 · 6 5 · 6 9 · 2

Got questions? Get instant answers now!

7 · 4 2 ( 8 5 ) 9 · 3 3 · 5

11 6

Got questions? Get instant answers now!

9 · 7 3 ( 12 8 ) 8 · 7 6 · 6

Got questions? Get instant answers now!

9 ( 8 2 ) 3 ( 15 7 ) 6 ( 7 1 ) 3 ( 17 9 )

5 2

Got questions? Get instant answers now!

8 ( 9 2 ) 4 ( 14 9 ) 7 ( 8 3 ) 3 ( 16 9 )

Got questions? Get instant answers now!

Translate Phrases to Expressions with Fractions

In the following exercises, translate each English phrase into an algebraic expression.

the quotient of r and the sum of s and 10

r s + 10

Got questions? Get instant answers now!

the quotient of A and the difference of 3 and B

Got questions? Get instant answers now!

the quotient of the difference of x and y , and 3

x y −8

Got questions? Get instant answers now!

the quotient of the sum of m and n , and 4 q

Got questions? Get instant answers now!

Everyday math

Baking. A recipe for chocolate chip cookies calls for 3 4 cup brown sugar. Imelda wants to double the recipe. How much brown sugar will Imelda need? Show your calculation. Measuring cups usually come in sets of 1 4 , 1 3 , 1 2 , and 1 cup. Draw a diagram to show two different ways that Imelda could measure the brown sugar needed to double the cookie recipe.

1 1 2 cups answers will vary

Got questions? Get instant answers now!

Baking. Nina is making 4 pans of fudge to serve after a music recital. For each pan, she needs 2 3 cup of condensed milk. How much condensed milk will Nina need? Show your calculation. Measuring cups usually come in sets of 1 4 , 1 3 , 1 2 , and 1 cup. Draw a diagram to show two different ways that Nina could measure the condensed milk needed for 4 pans of fudge.

Got questions? Get instant answers now!

Portions Don purchased a bulk package of candy that weighs 5 pounds. He wants to sell the candy in little bags that hold 1 4 pound. How many little bags of candy can he fill from the bulk package?

20 bags

Got questions? Get instant answers now!

Portions Kristen has 3 4 yards of ribbon that she wants to cut into 6 equal parts to make hair ribbons for her daughter’s 6 dolls. How long will each doll’s hair ribbon be?

Got questions? Get instant answers now!

Writing exercises

Rafael wanted to order half a medium pizza at a restaurant. The waiter told him that a medium pizza could be cut into 6 or 8 slices. Would he prefer 3 out of 6 slices or 4 out of 8 slices? Rafael replied that since he wasn’t very hungry, he would prefer 3 out of 6 slices. Explain what is wrong with Rafael’s reasoning.

Answers may vary

Got questions? Get instant answers now!

Give an example from everyday life that demonstrates how 1 2 · 2 3 is 1 3 .

Got questions? Get instant answers now!

Explain how you find the reciprocal of a fraction.

Answers may vary

Got questions? Get instant answers now!

Explain how you find the reciprocal of a negative number.

Got questions? Get instant answers now!

Self check

After completing the exercises, use this checklist to evaluate your mastery of the objectives of this section.

A table is shown that is made up of four columns and seven rows. The first row reads “I can…” in the first column, “Confidently” in the second column, “With some help” in the third column and “No – I don’t get it” in the last column. The next row down in the first column reads “find equivalent fractions”, under this reads “simplify fractions”, under this reads “multiply fractions”, under this reads “divide fractions”, under this reads “Simplify expressions written with a fraction bar” and under this reads “translate phrases to expressions with fractions.”

After looking at the checklist, do you think you are well prepared for the next section? Why or why not?

Questions & Answers

how does Neisseria cause meningitis
Nyibol Reply
what is microbiologist
Muhammad Reply
what is errata
Muhammad
is the branch of biology that deals with the study of microorganisms.
Ntefuni Reply
What is microbiology
Mercy Reply
studies of microbes
Louisiaste
when we takee the specimen which lumbar,spin,
Ziyad Reply
How bacteria create energy to survive?
Muhamad Reply
Bacteria doesn't produce energy they are dependent upon their substrate in case of lack of nutrients they are able to make spores which helps them to sustain in harsh environments
_Adnan
But not all bacteria make spores, l mean Eukaryotic cells have Mitochondria which acts as powerhouse for them, since bacteria don't have it, what is the substitution for it?
Muhamad
they make spores
Louisiaste
what is sporadic nd endemic, epidemic
Aminu Reply
the significance of food webs for disease transmission
Abreham
food webs brings about an infection as an individual depends on number of diseased foods or carriers dully.
Mark
explain assimilatory nitrate reduction
Esinniobiwa Reply
Assimilatory nitrate reduction is a process that occurs in some microorganisms, such as bacteria and archaea, in which nitrate (NO3-) is reduced to nitrite (NO2-), and then further reduced to ammonia (NH3).
Elkana
This process is called assimilatory nitrate reduction because the nitrogen that is produced is incorporated in the cells of microorganisms where it can be used in the synthesis of amino acids and other nitrogen products
Elkana
Examples of thermophilic organisms
Shu Reply
Give Examples of thermophilic organisms
Shu
advantages of normal Flora to the host
Micheal Reply
Prevent foreign microbes to the host
Abubakar
they provide healthier benefits to their hosts
ayesha
They are friends to host only when Host immune system is strong and become enemies when the host immune system is weakened . very bad relationship!
Mark
what is cell
faisal Reply
cell is the smallest unit of life
Fauziya
cell is the smallest unit of life
Akanni
ok
Innocent
cell is the structural and functional unit of life
Hasan
is the fundamental units of Life
Musa
what are emergency diseases
Micheal Reply
There are nothing like emergency disease but there are some common medical emergency which can occur simultaneously like Bleeding,heart attack,Breathing difficulties,severe pain heart stock.Hope you will get my point .Have a nice day ❣️
_Adnan
define infection ,prevention and control
Innocent
I think infection prevention and control is the avoidance of all things we do that gives out break of infections and promotion of health practices that promote life
Lubega
Heyy Lubega hussein where are u from?
_Adnan
en français
Adama
which site have a normal flora
ESTHER Reply
Many sites of the body have it Skin Nasal cavity Oral cavity Gastro intestinal tract
Safaa
skin
Asiina
skin,Oral,Nasal,GIt
Sadik
How can Commensal can Bacteria change into pathogen?
Sadik
How can Commensal Bacteria change into pathogen?
Sadik
all
Tesfaye
by fussion
Asiina
what are the advantages of normal Flora to the host
Micheal
what are the ways of control and prevention of nosocomial infection in the hospital
Micheal
what is inflammation
Shelly Reply
part of a tissue or an organ being wounded or bruised.
Wilfred
what term is used to name and classify microorganisms?
Micheal Reply
Binomial nomenclature
adeolu
Got questions? Join the online conversation and get instant answers!
Jobilize.com Reply
Practice Key Terms 7

Get Jobilize Job Search Mobile App in your pocket Now!

Get it on Google Play Download on the App Store Now




Source:  OpenStax, Elementary algebra. OpenStax CNX. Jan 18, 2017 Download for free at http://cnx.org/content/col12116/1.2
Google Play and the Google Play logo are trademarks of Google Inc.

Notification Switch

Would you like to follow the 'Elementary algebra' conversation and receive update notifications?

Ask