Ratios Rates and Proportions

​Ratios Rates and Proportions

By Sarah Cooper

Using Proportions to solve problems

Sam went to a restaurant for dinner. the total bill was $25 and he left a 15% tip. What was the amount of the tip?

The animal shelter had 250 dogs, this weekend 54 dogs were brought in. By what percentage did the dog population in the shelter increase?

This weekend 1500 people visited the local amusement park. 45% of the sales happened before noon. 15% of the sales happened between noon and 4pm, and the rest of the sales were after 4pm. How many sales happened after 4pm?

A flower grew from 10 inches to 14 inches over the summer. By what percentage the the flowers height increase?

The ratio of boys to girls in a classroom was 2:3. There are 15 girls in the class, how many boys are in the in class?

Multiple Choice

Jessica takes 2 minutes to complete each of her homework problems. How long will it take her to complete 5 problems?

• 10

• 2.5

• 12

• 4

Multiple Choice

The ratio of parrots to cats in a pet store is 5 to 20. If there are 4 parrots, how many cats are there?

• 16

• 20

• 1

• 25

Multiple Choice

Sarah used 9 red beads and 12 blue beads to make a bracelet. Using this same pattern, how many blue beads would she need if she had 15 red beads?

• 20

• 45

• 30

• 10