-64.16% is the change from 865 to 310
Calculation steps:
[( 310 - 865 ) ÷ 865] x 100 = -64.16%
Formula
Percentage change = [(310 - 865) / 865] x 100
Subtract the new number by the original number
310 - 865 = -555
-555 ÷ 865 = -0.6416184971098265
-0.6416184971098265 x 100 = -64.16%