32.81% is the change from 128 to 170
Calculation steps:
[( 170 - 128 ) ÷ 128] x 100 = 32.81%
Formula
Percentage change = [(170 - 128) / 128] x 100
Subtract the new number by the original number
170 - 128 = 42
42 ÷ 128 = 0.328125
0.328125 x 100 = 32.81%