-27.66% is the change from 235 to 170
Calculation steps:
[( 170 - 235 ) ÷ 235] x 100 = -27.66%
Formula
Percentage change = [(170 - 235) / 235] x 100
Subtract the new number by the original number
170 - 235 = -65
-65 ÷ 235 = -0.2765957446808511
-0.2765957446808511 x 100 = -27.66%