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 80% of the votes cast and 78% of a town's 31,000 voters cast a vote, how many votes did the mayor receive?
| 13,541 | |
| 19,344 | |
| 18,619 | |
| 17,893 |