-98.8% is the change from 836 to 10
Calculation steps:
[( 10 - 836 ) ÷ 836] x 100 = -98.8%
Formula
Percentage change = [(10 - 836) / 836] x 100
Subtract the new number by the original number
10 - 836 = -826
-826 ÷ 836 = -0.9880382775119617
-0.9880382775119617 x 100 = -98.8%