-84.59% is the change from 837 to 129
Calculation steps:
[( 129 - 837 ) ÷ 837] x 100 = -84.59%
Formula
Percentage change = [(129 - 837) / 837] x 100
Subtract the new number by the original number
129 - 837 = -708
-708 ÷ 837 = -0.8458781362007168
-0.8458781362007168 x 100 = -84.59%