-32.61% is the change from 230 to 155
Calculation steps:
[( 155 - 230 ) ÷ 230] x 100 = -32.61%
Formula
Percentage change = [(155 - 230) / 230] x 100
Subtract the new number by the original number
155 - 230 = -75
-75 ÷ 230 = -0.32608695652173914
-0.32608695652173914 x 100 = -32.61%