-80.38% is the change from 836 to 164
Calculation steps:
[( 164 - 836 ) ÷ 836] x 100 = -80.38%
Formula
Percentage change = [(164 - 836) / 836] x 100
Subtract the new number by the original number
164 - 836 = -672
-672 ÷ 836 = -0.8038277511961722
-0.8038277511961722 x 100 = -80.38%