170% is the change from 20 to 54
Calculation steps:
[( 54 - 20 ) ÷ 20] x 100 = 170%
Formula
Percentage change = [(54 - 20) / 20] x 100
Subtract the new number by the original number
54 - 20 = 34
34 ÷ 20 = 1.7
1.7 x 100 = 170%
Example