-86.87% is the change from 815 to 107
Calculation steps:
[( 107 - 815 ) ÷ 815] x 100 = -86.87%
Formula
Percentage change = [(107 - 815) / 815] x 100
Subtract the new number by the original number
107 - 815 = -708
-708 ÷ 815 = -0.8687116564417178
-0.8687116564417178 x 100 = -86.87%