-84.81% is the change from 849 to 129
Calculation steps:
[( 129 - 849 ) ÷ 849] x 100 = -84.81%
Formula
Percentage change = [(129 - 849) / 849] x 100
Subtract the new number by the original number
129 - 849 = -720
-720 ÷ 849 = -0.8480565371024735
-0.8480565371024735 x 100 = -84.81%