-88.16% is the change from 836 to 99
Calculation steps:
[( 99 - 836 ) ÷ 836] x 100 = -88.16%
Formula
Percentage change = [(99 - 836) / 836] x 100
Subtract the new number by the original number
99 - 836 = -737
-737 ÷ 836 = -0.881578947368421
-0.881578947368421 x 100 = -88.16%