Percent Change, Error, Interest Practice

Tickets to Disney World are $100.The price is going to increase on January 1. What is the percent of change if the cost increases to a $120?

• 25%

• 18%

• 20%

• 50%

The number of people signed up for a bus trip increased from 32 to 45. What is the percent increase? Round to the nearest percent.

• 52%

• 41%

• 42%

• 45%

The regular price of a scooter is $65.50. It is on sale for $52.40. What is the percent decrease from the regular price to the sale price of the scooter? 

• 35%

• 25%

• 30%

• 20%

Find the percent increase. Round to the nearest percent.
From $5 to $8 

• 40%

• 60%

• 55%

• 65%

Find the percent change.
Original amount:  16
New amount: 11

• 5%

• 31%

• .3%

• 56%

Calculate the percent change from 50 to 75.

• 25%

• 50%

• 75%

• 100%

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

The value of a new iphone is $550, but after a year or two of use the value drops to $300. What is the percent change in the value of an iPhone?

What is the percent change when a quantity increases from 100 to 150?

• 25%

• 50%

• 75%

• 100%

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%