Percentages are ratios of an amount compared to 100. The percent change of an old to new value is equal to 100% x \({ new - old \over old }\).
Monica scored 87% on her final exam. If each question was worth 3 points and there were 180 possible points on the exam, how many questions did Monica answer correctly?
| 62 | |
| 40 | |
| 48 | |
| 52 |