Chapter 2 - Solving Equations - 2-9 Percents - Practice and Problem-Solving Exercises - Page 142: 35

1333.33%

This is a percent because we are asked to find what percent of one number another number is. In order to find what percent a number is of another number, divide that number by the other number and multiply by 100. Thus, we divide 400 by 30 and multiply by 100 to get 1333.33 percent.