7.RP.3 Percents Check (Simple Interest, Percent Change, and Percent Error)

by Laura Rigg

| 5 QuestionsNote from the author:

This check assesses student understanding of simple interest, percent change, and percent error. Students were expected to earn at least 80% (4 out of 5 questions correct) to be considered proficient. I chose short answer as I expected students to get an accurate calculation and to round to the nearest hundredth or tenth depending on the problem.

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Round answers to the nearest cent or hundredth for money.

Round answers to the nearest tenth for percents.

1

1

Anna put $500 into a savings account and made no more deposits or withdrawals. The account earns 2% simple interest per year. How much money will be in the account after 5 years?

2

1

Tyler borrowed $2,000 at an 11.5% simple interest rate. What is the total amount Tyler will pay back at the end of 5 years?

3

1

A new automobile costs $23,782 but after one year it is worth $17,668. What is the percent of decrease in the value of the automobile?

4

1

In 2012, the population in a town was 8,000 people. In 2017, the population was 11,400. What was the percent increase in the population?

5

1

Lydia guessed there were 180 jelly beans in a container. There were actually 220 jelly beans in the container. What was Lydia's percent error?

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