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 91% on her final exam. If each question was worth 3 points and there were 300 possible points on the exam, how many questions did Monica answer correctly?
| 91 | |
| 94 | |
| 90 | |
| 81 |