-99.88% is the change from 836 to 1
Calculation steps:
[( 1 - 836 ) ÷ 836] x 100 = -99.88%
Formula
Percentage change = [(1 - 836) / 836] x 100
Subtract the new number by the original number
1 - 836 = -835
-835 ÷ 836 = -0.9988038277511961
-0.9988038277511961 x 100 = -99.88%