-81.94% is the change from 310 to 56
Calculation steps:
[( 56 - 310 ) ÷ 310] x 100 = -81.94%
Formula
Percentage change = [(56 - 310) / 310] x 100
Subtract the new number by the original number
56 - 310 = -254
-254 ÷ 310 = -0.8193548387096774
-0.8193548387096774 x 100 = -81.94%