Percentages are ratios of an amount compared to 100. The percent change of an old to new value is equal to 100% x \({ new - old \over old }\).
Jennifer scored 90% on her final exam. If each question was worth 3 points and there were 270 possible points on the exam, how many questions did Jennifer answer correctly?
| 82 | |
| 68 | |
| 88 | |
| 81 |