-85.28% is the change from 815 to 120
Calculation steps:
[( 120 - 815 ) ÷ 815] x 100 = -85.28%
Formula
Percentage change = [(120 - 815) / 815] x 100
Subtract the new number by the original number
120 - 815 = -695
-695 ÷ 815 = -0.852760736196319
-0.852760736196319 x 100 = -85.28%