128.21% is the change from 312 to 712
Calculation steps:
[( 712 - 312 ) ÷ 312] x 100 = 128.21%
Formula
Percentage change = [(712 - 312) / 312] x 100
Subtract the new number by the original number
712 - 312 = 400
400 ÷ 312 = 1.2820512820512822
1.2820512820512822 x 100 = 128.21%