675% is the change from 20 to 155
Calculation steps:
[( 155 - 20 ) ÷ 20] x 100 = 675%
Formula
Percentage change = [(155 - 20) / 20] x 100
Subtract the new number by the original number
155 - 20 = 135
135 ÷ 20 = 6.75
6.75 x 100 = 675%
Example