Percent Change and Percent Error Practice

A tank of water starts the day with 12 gallons. By the end of the day, the tank of the water has 8.4 gallons. What was the percent of change of the water in the tank?

• 3.6%

• 4.2%

• 30%

• 70%

Tags

CCSS.7.RP.A.2

CCSS.7.RP.A.3

The price of sweater during the Winter season was $45. After the winter season, the price of the sweater was $36. What was the percent decrease for the price of the sweater?

• 2.5%

• 9%

• 20%

• 25%

Tags

CCSS.7.RP.A.2

CCSS.7.RP.A.3

Terry earned $10 per hour during the first month of his new job. By the 6th month he was earning $15 per hour. What was the percent increase for his earnings?

• 1.5%

• 5.0%

• 33%

• 50%

Tags

CCSS.7.RP.A.2

CCSS.7.RP.A.3

A shirt that was originally priced at $25 was lowered to $17.50. What was the discount rate for the shirt?

• 7.5%

• 1.42%

• 30%

• 70%

Tags

CCSS.7.RP.A.2

CCSS.7.RP.A.3

A TV that was on sale for $299. The price of the TV now is $599. What was the percent increase of the TV?

• 4.9%

• 2.0%

• 100%

• 50%

Tags

CCSS.7.RP.A.2

CCSS.7.RP.A.3

Bill estimates that it will take 50 envelopes to mail out Birthday invitations. It actually took $75 envelopes to mail birthday invitations. What was Bill's percent of error?

• 33%

• 50%

• 66%

• 150%

Tags

CCSS.7.RP.A.3

Haley predicts that she will make a 70 on her test. After taking it, she actually made a 55 on her test. What was her percent error?

• 78%

• 27%

• 21%

• 127%

Tags

CCSS.7.RP.A.3

In jellybean guessing contest, Erica guessed that 150 jellybeans were in the jar. The Jar actually contained 180 jelly beans. What was the percent error of Erica's guess?

• 16%

• 20%

• 83%

• 120%

Tags

CCSS.7.RP.A.3

Emma needs 84 centimeters of ribbon. She measures and cuts a piece from a spool of

ribbon. Later she finds out she has actually cut 80 centimeters of ribbon. What is her

percent error? Round your answer to the nearest tenth.

• 4.5%

• 5.0%

• 95.0%

• 105.0%

Tags

CCSS.7.RP.A.3

Christopher estimates it will take him half an hour to complete his math homework. He is

able to complete it in 25 minutes. What is the percent error in his estimate?

• 20%

• 41%

• 58%

• 83%

Tags

CCSS.7.RP.A.3