-86.77% is the change from 310 to 41
Calculation steps:
[( 41 - 310 ) ÷ 310] x 100 = -86.77%
Formula
Percentage change = [(41 - 310) / 310] x 100
Subtract the new number by the original number
41 - 310 = -269
-269 ÷ 310 = -0.867741935483871
-0.867741935483871 x 100 = -86.77%