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 78% on her final exam. If each question was worth 4 points and there were 200 possible points on the exam, how many questions did Jennifer answer correctly?
| 54 | |
| 25 | |
| 39 | |
| 32 |