Unit Rates

Unit Rates

By Susan Kahler

​Remember that when you divide fractions, the rule is multiply by the reciprocal. (Keep, Change, Flip)

​It is ok to get a decimal or a fraction when you do this. Look at the examples below

You will have some unit rates where you are asked to work with mixed numbers as shown on the left.

When given mixed numbers turn them into improper fractions before dividing.

Remember when you divide fractions follow the Keep Change Flip pattern. ​

Example with Complex Fractions

Some text here about the topic of discussion

Fill in the Blank

Johnny read 300 words in 6 minutes. At what rate, words per minute, is Jonny reading? ( Since you want words per minute, words goes on top and minutes goes on the bottom)

Fill in the Blank

A teacher sharpens 108 pencils to distribute to her 27 kindergarten students. How many pencils should each student get? Express as pencils per student. ( $$\frac{pencils}{students}$$  )

Fill in the Blank

George finished 1/4 of a level of his computer game in 1/3 of an hour. How many hours will it take him to complete one level?

Multiple Choice

Betty makes pies. To make 6 pies, she uses $$7\ \frac{1}{2}$$  Cups of flour. How many cups of flour are needed to make 1 pie? ( Because you want 1 pie your fraction is $$\frac{flour\ }{pie}$$  )

• $$1\ \frac{1}{4}$$  cups

• 45 cups

• 1/45 cups

• 1/4 cup

Multiple Choice

• Sue's

• Millie's

• Tamira's

• Creative

Multiple Choice

• Marcus

• Joseph

• Harper

• Nikki

Multiple Choice

Six tubs of frosting costs $5. How much is it for 1 tub of frosting?

• $1 per tub

• $8.30 per tub

• $0.83 per tub

• $0.08 per tub

Multiple Choice

A piano teacher charges $200 for 12 piano lessons. How much is it for one piano lesson?

• $16.67 per lesson

• $17 per lesson

• $1.67 per lesson

• $16 per lesson

Multiple Choice

A company charges $2.95 for 24 bottles of water. What is the cost per bottle of water?

• $0.12 per bottle

• $8.14 per bottle

• $0.25 per bottle

• $1.12 per bottle

Multiple Choice

Jane is buying coffee. Coffee Shop A sells 30 ounces for $9.95 and Coffee Shop B sells 12 ounces for $3.50. Which coffee shop is cheaper per ounce?

• A because they are selling you more coffee in total

• A because there unit price is $0.29 per ounce where B is $0.33 per ounce

• B because their unit price is $0.29 per ounce and A is $0.33 per ounce