Divide a / b and note the position of the decimal
Move the decimal two places to the right and write a % sign
If, after moving, the decimal occurs at the end of a number, drop the decimal and write a % sign
Examples :
3/4 = . 75 = 75.% = 75%
5/4 = 1.25 = 125.% = 125%
7/8 = .875 = 87.5%