685% is the change from 20 to 157
Calculation steps:
[( 157 - 20 ) ÷ 20] x 100 = 685%
Formula
Percentage change = [(157 - 20) / 20] x 100
Subtract the new number by the original number
157 - 20 = 137
137 ÷ 20 = 6.85
6.85 x 100 = 685%
Example