Percent Error
Increase & Decrease
Proportional Relationships
Terminating or Repeating
100

Maria measured the length of her pencil and estimated it to be 18 cm, but the actual length is 20 cm. What is the percent error in Maria's measurement?

10%

100

A bicycle is 48 inches long. A motorcycle is 15% longer than the bicycle. How long is the motorcycle?

55.2 inches

100

At a grocery store, 3 pounds of apples cost $4.50. How much would 7 pounds of apples cost?

$10.50

100

What is 1/8 as a decimal?

0.125

200

A grocery store label says a watermelon weighs 9.5 lbs, but when measured on a more accurate scale, it actually weighs 10 lbs. What is the percent error in the store’s label?

5%

200

A shirt is on sale for $36, which is 20% off the original price. What was the original price before the discount?

45

200

Emma runs 4 miles in 32 minutes at a constant speed. How long will it take her to run 6 miles at the same pace?

48 minutes

200

What is 5/6 as a decimal?

0.83333

300

A thermometer reads 72°F, but the actual temperature outside is 75°F. What is the percent error in the thermometer’s reading?

4%

300

The cost of every college is expected to increase 3.5% next year. The cost to attend Westish College is currently dollar $18000. What is the expected cost to attend Westish College next year?

$18,630

300

A recipe for 8 pancakes requires 2 cups of flour. How many cups of flour are needed to make 20 pancakes?

5 cups

300

What is 7/8 as a decimal?

0.875

400

Jacob estimates that a tree in his backyard is 25 feet tall. Later, he measures it with a laser tool and finds that it is actually 30 feet tall. What is the percent error in Jacob's estimate?

16.666%

400

A town’s population increased by 25%, and the new population is 12,500 people. What was the original population before the increase?

10,000

400


A store is offering a 20% discount on all items. Is there a proportional relationship between the original price of an item and its price after the discount?




Yes

400

What is 5/12 as a decimal?

0.416666666

500

Samantha thinks a shirt at a store costs $22, but when she checks the price tag, it actually costs $20. What is the percent error in Samantha's estimate?

10%

500

The cost of every college is expected to increase 3.5% next year.

The cost to attend Faber College is currently $24000


If the percentage increase stays constant, what will the cost be in two years?

$25,709.40

500

Liam can type 300 words in 5 minutes at a constant rate. How many words can he type in 8 minutes?

480 words

500

What is 1/16 as a decimal?

0.0625