36% is the change from 125 to 170
Calculation steps:
[( 170 - 125 ) ÷ 125] x 100 = 36%
Formula
Percentage change = [(170 - 125) / 125] x 100
Subtract the new number by the original number
170 - 125 = 45
45 ÷ 125 = 0.36
0.36 x 100 = 36%
Example