Problem 17 of 22num-017
A library had laptops to lend last year and has this year. By what percent did the number of laptops increase?
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Solution walkthrough1:30
- Percent change compares the change to the old amount: change old, written as a percent.
- The change is laptops.
- Compare the change to the old amount: . The splits into four blocks of .
- As a percent, . One block added to four blocks is a increase.
- Traps: 12% is the change itself, 20% divides by the new , and 125% is , the whole new amount.