-84.29% is the change from 840 to 132
Calculation steps:
[( 132 - 840 ) ÷ 840] x 100 = -84.29%
Formula
Percentage change = [(132 - 840) / 840] x 100
Subtract the new number by the original number
132 - 840 = -708
-708 ÷ 840 = -0.8428571428571429
-0.8428571428571429 x 100 = -84.29%