475% is the change from 20 to 115
Calculation steps:
[( 115 - 20 ) ÷ 20] x 100 = 475%
Formula
Percentage change = [(115 - 20) / 20] x 100
Subtract the new number by the original number
115 - 20 = 95
95 ÷ 20 = 4.75
4.75 x 100 = 475%
Example