Percentages are ratios of an amount compared to 100. The percent change of an old to new value is equal to 100% x \({ new - old \over old }\).
Diane scored 88% on her final exam. If each question was worth 3 points and there were 180 possible points on the exam, how many questions did Diane answer correctly?
| 53 | |
| 51 | |
| 64 | |
| 57 |