Percent Change

Percent Change is a ratio that compares the ____________ to the _____________.

• New amount to Original amount

• Change amount to Original amount

• Change amount to New amount

• New amount to Original amount

Answer explanation

Percent Change = Change/Original

The population of fish in my pond went from about 25 to about 32. This will be a percent ___________

• Increase

• Decrease

• Original

• New

Answer explanation

The values went up, so a percent increase.

After practicing, Pat's race time went from 12½ mins to 11¾ mins. This will be a percent .......

• increase

• decrease

Answer explanation

The time went down, so a decrease.

A $175 coat was reduced to $150. Which set-up will find the percent change?

• 25/175

• 25/150

• 150/175

Answer explanation

Change/original

Tags

CCSS.7.RP.A.3

A division was done to find the percent change and the calculator read 0.1963 How should this be written to the nearest whole percent?

• 19%

• 20%

• 19.6%

• 0.2%

Answer explanation

Multiply by 100 and see that 19.63 rounds up to 20

You used a $5 coupon and paid the sale price of $40 for a pair of shoes. Which set-up calculates the percent of change?

• 5/40

• 5/35

• 5/45

Answer explanation

If $40 is the sale price, then $45 was the original price, so 5/45

In 2019, the number of 7th grade students was 48. In 2020, there are 36 8th grade students. Calculate the percent decrease. Write only the number and percent symbol.

Answer explanation

The difference is 12. 12/48 simplifies to 1/4 which is 25%

40 increases by 10 to 50. If 50 reduces by 10 to 40, is this the same percent change in each direction?

• Yes because the two numbers are the same

• No, because 10/40 is different to 10/50

• No, because 40/50 is different to 50/40

Answer explanation

when the change is the same, but the originals are different, then the percent is different.

The number of school hours is 6.5. If this were to change to 7, what would the percent increase be? Round to the nearest tenth of a percent.

• 0.08%

• 7.6%

• 76.9%

• 7.7%

Answer explanation

0.0769 = 7.69% which rounds to 7.7%

In one bag of skittles, there were 10 red ones. In the next bag there were only 8 red ones. What is this as a percent decrease? Write only the number and percent symbol.

Answer explanation

2/10 = 20%