Percent Error and Percent Interest

Miss Sylvie miscounted and thought she saw 33 children on the bus. When she counted again, she realizes there are actually only 30 students on the bus. What is her percent error?

• 10%

• 9%

• 90%

• 91%

The students measured length during a science experiment, they got 12 cm. But the actual measurement was 14.25 cm. What was the percent error?

• 15.79%

• 18.75%

• 2.25%

• 8.72%

Zed went to the store and bought a bag of chips.  He estimated there would be 350 chips in the package, but realized there were only 200 chips in that package.  What was his percent error?

• 35%

• 75%

• 85%

• 92%

An archaeologist estimated that a fossil was 520 years old. It was actually 500 years old. What was the percent error?

• 4%

• 20%

• 3.8%

• 15.2%

The distance around a neighborhood is 6 miles. When Sam clocked it with an odometer, the distance was 5.52 miles.

What is the percent error of the clocking?

• 10%

• 6.5%

• 7%

• 8%

The ratio that describes how far an estimate is from the actual amount

• Percent Error

• Percent Change

• Percent

The student council estimated that they would have 250 people attend the homecoming dance. The number of people who attended was 315. What is the percent of error to the nearest hundredth percent? Type the answer in the blank up to the hundredth place value.

Mathematical Equivalence

ON

Jane deposited $22,000 at a bank that pays 10% interest. Bill deposited $16,000 at a bank that pays 16% interest. Who will receive more interest in a year, and by how much more?

A scientist measures a substance to be 75 grams, but the actual weight of the substance is 100 grams. What is the percent error of the scientist's measurement?

• 33%

• 25%

• 20%

• 25.5%

When Lila was born, her parents put $8,000 into a savings account that earned 9% simple interest. Find the amount of interest earned after 18 years.

• $720

• $20,960

• $1,080

• $12,960