Lesson 3: Percent Change and Error — Practice Questions

1. 1. Ayodele's hourly pay was raised from 24.50 dollars to 25.48 dollars. What is the percent increase? Round to the nearest tenth of a percent. ___%

2. 2. Annual student fees at a university rose from about 4,000 dollars to about 9,000 dollars. What is the percent increase? ___%

3. 3. Annual global seafood consumption rose from 22 pounds per person to 38 pounds per person. Find the percent increase. (Round to the nearest tenth of a percent.) The percent increase is ___%.

4. 4. At a coffee cart, a coffee costs 1.65 dollars. A customer pays with 2.00 dollars and leaves the change as a tip. What percent tip does she leave? (Round to the nearest whole percent.) The tip is ___%.

5. 5. In one month, the median home price in a region rose from 225,400 dollars to 241,500 dollars. Find the percent increase. (Round to the nearest tenth of a percent.) The percent increase is ___%.

6. 6. The price of a share of one stock rose from 12.50 dollars to 50.00 dollars. What is the percent increase? ___%

7. 7. Tamanika's hourly pay was raised from 15.50 dollars to 17.55 dollars. What is the percent increase? Round to the nearest tenth of a percent. ___%

8. 8. After a 20% discount, a shirt costs 40 dollars. To restore the price to its original value, the price must be increased by ___%.

9. 9. If a value is increased by 10% and then the new value is decreased by 10%, what is the final result compared to the original value?

   • A. The final value is greater than the original.
   • B. The final value is less than the original.
   • C. The final value is equal to the original.
   • D. It cannot be determined without the original value.

10. 10. A bookshelf holds 5 books. If you add 3 more books, the number of books on the shelf has increased by ___%.