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 57% of a town's 42,000 voters cast a vote, how many votes did the mayor receive?
| 20,828 | |
| 20,349 | |
| 19,152 | |
| 17,476 |