-55.83% is the change from 815 to 360
Calculation steps:
[( 360 - 815 ) ÷ 815] x 100 = -55.83%
Formula
Percentage change = [(360 - 815) / 815] x 100
Subtract the new number by the original number
360 - 815 = -455
-455 ÷ 815 = -0.558282208588957
-0.558282208588957 x 100 = -55.83%