-86.5% is the change from 815 to 110
Calculation steps:
[( 110 - 815 ) ÷ 815] x 100 = -86.5%
Formula
Percentage change = [(110 - 815) / 815] x 100
Subtract the new number by the original number
110 - 815 = -705
-705 ÷ 815 = -0.8650306748466258
-0.8650306748466258 x 100 = -86.5%