650% is the change from 20 to 150
Calculation steps:
[( 150 - 20 ) ÷ 20] x 100 = 650%
Formula
Percentage change = [(150 - 20) / 20] x 100
Subtract the new number by the original number
150 - 20 = 130
130 ÷ 20 = 6.5
6.5 x 100 = 650%
Example