-56.83% is the change from 315 to 136
Calculation steps:
[( 136 - 315 ) ÷ 315] x 100 = -56.83%
Formula
Percentage change = [(136 - 315) / 315] x 100
Subtract the new number by the original number
136 - 315 = -179
-179 ÷ 315 = -0.5682539682539682
-0.5682539682539682 x 100 = -56.83%