Percent of Change and Simple Interest

Percent of Change

and

Simple Interest

By Mrs. Hawley

​Percent of Change

​Maria had 12 pairs of shoes in January. She went shopping in February and now she has 15 pairs of shoes. What is the percent of change in the number of shoes Maria owns?

Multiple Choice

Tim had 16 fish last week. Some of them had baby fish and now he has 24 fish. What was the percent of change?

• 10%

• 50%

• 5%

• 25%

Multiple Choice

Brittney made 30 cookies. Her sister ate some and now she only has 20 left. What was the percent of change?

• 66.6% increase

• 33.3% increase

• 33.3% decrease

• 66.6% decrease

​Simple Interest: I = prt

percent of the principle times the years

​

add the principle IF they ask for the total​

Multiple Choice

If you put $350 in an account with 4% interest for 5 years how much would you have in total?

• $70

• $420

• $280

• $7

Multiple Choice

If you put $20 in an account with 2% interest for 6 months how much would you earn?

• $18

• $0.20

• $0.40

• $20.40