-23.87% is the change from 310 to 236
Calculation steps:
[( 236 - 310 ) ÷ 310] x 100 = -23.87%
Formula
Percentage change = [(236 - 310) / 310] x 100
Subtract the new number by the original number
236 - 310 = -74
-74 ÷ 310 = -0.23870967741935484
-0.23870967741935484 x 100 = -23.87%