-83.85% is the change from 842 to 136
Calculation steps:
[( 136 - 842 ) ÷ 842] x 100 = -83.85%
Formula
Percentage change = [(136 - 842) / 842] x 100
Subtract the new number by the original number
136 - 842 = -706
-706 ÷ 842 = -0.838479809976247
-0.838479809976247 x 100 = -83.85%