Ratios/Rates/Proportions

What is a proportion?

• a special ratio in which the two terms are in different units.

• an equation in which two ratios are set equal to each other

• value used for representing the quantity and used in making calculations

• a mathematical sentence, made up of numbers and signs

Tags

CCSS.7.RP.A.2A

What is a ratio?

• A comparison of two numbers using division.

• the result of adding one number the number of times indicated by a second number

• an equality of two ratios

• the quotient of a ratio where the quantities have different units

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2

A high school randomly selected 50 students to take a survey about extending their lunch period. Of students selected for the survey, 14 were freshmen and 13 were sophomores.

14 : 50 can be reduced to what?

• 2 : 14

• 7 : 25

• 25 : 7

• 25 : 14

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2

A backyard pond has 12 sunfish and 30 rainbow shiners.

Write the ratio as a fraction.

(a)  

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2

Tony buys 6 large pizzas for $77.94, before tax.

The price for a single large pizza is___

• $13.99

• $11.99

• $12.99

• $10.99

Tags

CCSS.7.EE.B.3

Solve the following. Round to the nearest whole number

(a)  

Tags

CCSS.7.G.A.1

Solve the following with variables. Round to the nearest whole number

(a)  

Tags

CCSS.7.G.B.4

During one particular month, the number of sunny days in Bellingham was 4 days while the number of rainy days was 12. Write the ratio of number

of sunny days to number of rainy days.

• 4 to 12

• 4 : 12

• 4/12

• 1/3

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2

Write each rate 26 cups for 8 people as a fraction in simplest form, then give the unit rate.

• 8/26 cups per person

• 13/4 cups per person.

• 4/13 people per cup

• 13/4 people per cup

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2

Are these true or false proportions? Explain why: