AnswersCommon Core Math 7 - MA3107 CRPercent Increase and Decrease

Applications of Percent Answers

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The attendance at a seminar in year 1 was 500. In Year 2, the attendance changed by 100. What was the percent change in attendance?

A
The percent change was 0.2%.
B
The percent change was 0.4%.
C
The percent change was 20%.
D
The percent change was 40%.
2
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What is the approximate percent increase when the population of a town increases from 12,089 to 15,025? Round the population amounts to the nearest thousand to find an estimate of the percent increase.

A
The percent increase is approximately 10%.
B
The percent increase is approximately 25%.
C
The percent increase is approximately 33%.
D
The percent increase is approximately 80%.
3

Helen got a $7 reduction in the price of a pair of jeans that are normally $32. What is the approximate percent decrease in the price?

A
The percent decrease is approximately 15%.
B
The percent decrease is approximately 21%.
C
The percent decrease is approximately 43%.
D
The percent decrease is approximately 78%.
4

Why is the percent increase from 45 to 75 not equal to the percent decrease from 75 to 45? Select three options.

A
The amount of change is different for the percent increase and the percent decrease.
B
The ratio of the percent increase is not the same as the percent decrease.
C
The ratio for the percent increase has a smaller denominator than the percent decrease.
D
The ratio for the percent increase has a different numerator than the percent decrease.
E
The original amount for the percent increase is different from the original amount for the percent decrease.
5

Tanya’s swim club increased their $29 membership fee by $6 a year. What is the approximate percent increase in the membership fee?

A
The approximate percent increase is 20%.
B
The approximate percent increase is 26%.
C
The approximate percent increase is 82%.
D
The approximate percent increase is 120%.
6

If the average grade of an English class rose from 70 to 85, what is the approximate percent increase?

A
The percent increase is approximately 14%.
B
The percent increase is approximately 17%.
C
The percent increase is approximately 21%.
D
The percent increase is approximately 35%.
7

What is the percent decrease when the balance in a bank account goes from $300 to $60?

A
The percent decrease is 20%.
B
The percent decrease is 25%.
C
The percent decrease is 80%.
D
The percent decrease is 87%.
9

An education budget went from $800,000 to $900,000. What is the approximate percent increase?

A
The approximate percent increase is 13%.
B
The approximate percent increase is 89%.
C
The approximate percent increase is 98%.
D
The approximate percent increase is 113%.
10

Carey is trying to decide between two guitars. The first had an original price of $160, but is on sale for $100. The second had an original price of $250, but is on sale for $150. Which guitar has a greater percent change in price?

A
The first guitar has greater percent change of approximately 35%.
B
The second guitar has a greater percent change of approximately 40%.
C
The first guitar has a greater percent change of approximately 54%.
D
The second guitar has a greater percent change of approximately 67%.

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