-56.45% is the change from 310 to 135
Calculation steps:
[( 135 - 310 ) ÷ 310] x 100 = -56.45%
Formula
Percentage change = [(135 - 310) / 310] x 100
Subtract the new number by the original number
135 - 310 = -175
-175 ÷ 310 = -0.5645161290322581
-0.5645161290322581 x 100 = -56.45%