Ratios Rates and Unit Rates

What is a Ratio?

• Is a comparison of two quantities 

• A rate with a denominator of one

• It is when the only factor the numerator and denominator share is a one 

• Two decimals that can be multiplied

Simplify the ratio of
35 : 14

• 5 : 2

• 2 : 5

• 3 : 1

• 35: 14

Mr. Wright has 7 boys and 9 girls. What is the ratio of girls to boys?

• 7 to 9

• 9 to 7

Find each unit rate. Round your answer to the nearest hundredth:​ (a)   11 chickens lay 77 eggs _________eggs per chicken

• 7

• 22

• 30

• 10

The Healey family drove 192 miles in
4.5 hours. How many miles could they drive at this rate in 3 hours?

• 64 mi

• 77 mi

• 128 mi

• 184 mi

Diana uses 30 grams of coffee beans to make 48 fluid ounces of coffee. When guests come, she makes 96 fluid ounces of coffee. How many grams of coffee beans does Diana use when she has visitors?

Mathematical Equivalence

ON

The spice recipe calls for 1/2 tsp of crushed red pepper flakes for every 1 and 1/4 tsp of black pepper.  If you use 3 tsp of crushed red pepper, how many teaspoons of black pepper do you need?

• 6/5 tsp black pepper

• 5/2 tsp black pepper

• 15/2 tsp black pepper

• 1 tsp black pepper

On a map, if one centimeter represents 25 miles, how many miles does 7 centimeters represent?

• 175

• 185

• 200

• 220

Find each unit rate. Round your answer to the nearest hundredth:​ (a)  

11 chickens lay 77 eggs _________eggs per chicken

• 7

• 22

• 30

• 10

irections: Find each unit rate. Round your answer to the nearest hundredth:​ (a)  

7 penguins for $126.00 ________ each

• $18

• $24

• $4

• $10