-90.07% is the change from 836 to 83
Calculation steps:
[( 83 - 836 ) ÷ 836] x 100 = -90.07%
Formula
Percentage change = [(83 - 836) / 836] x 100
Subtract the new number by the original number
83 - 836 = -753
-753 ÷ 836 = -0.9007177033492823
-0.9007177033492823 x 100 = -90.07%