Percentages are ratios of an amount compared to 100. The percent change of an old to new value is equal to 100% x \({ new - old \over old }\).
Charlie loaned Betty $300 at an annual interest rate of 4%. If no payments are made, what is the total amount owed at the end of the first year?
| $303 | |
| $312 | |
| $309 | |
| $327 |