How can a fraction be changed to a percent?

To write a fraction as a percent, find an equivalent fraction with denominator 100, if it is possible, then the numerator represent the fraction as a percent. Or simply, divide the numerator by the denominator, and move the decimal point two places to the right.

Examples:

7/20 = (7 x 5)/(20 x 5) = 35/100 = 35%

3/8 = 0.375 = 37.5 % or 37 1/2 %