680% is the change from 20 to 156
Calculation steps:
[( 156 - 20 ) ÷ 20] x 100 = 680%
Formula
Percentage change = [(156 - 20) / 20] x 100
Subtract the new number by the original number
156 - 20 = 136
136 ÷ 20 = 6.8
6.8 x 100 = 680%
Example