135.29% is the change from 170 to 400
Calculation steps:
[( 400 - 170 ) ÷ 170] x 100 = 135.29%
Formula
Percentage change = [(400 - 170) / 170] x 100
Subtract the new number by the original number
400 - 170 = 230
230 ÷ 170 = 1.3529411764705883
1.3529411764705883 x 100 = 135.29%