Percentages are ratios of an amount compared to 100. The percent change of an old to new value is equal to 100% x \({ new - old \over old }\).
If a mayor is elected with 90% of the votes cast and 80% of a town's 15,000 voters cast a vote, how many votes did the mayor receive?
| 7,440 | |
| 8,400 | |
| 9,480 | |
| 10,800 |