Percentages are ratios of an amount compared to 100. The percent change of an old to new value is equal to 100% x \({ new - old \over old }\).
April scored 91% on her final exam. If each question was worth 4 points and there were 280 possible points on the exam, how many questions did April answer correctly?
| 56 | |
| 79 | |
| 64 | |
| 60 |