-87.2% is the change from 656 to 84
Calculation steps:
[( 84 - 656 ) ÷ 656] x 100 = -87.2%
Formula
Percentage change = [(84 - 656) / 656] x 100
Subtract the new number by the original number
84 - 656 = -572
-572 ÷ 656 = -0.8719512195121951
-0.8719512195121951 x 100 = -87.2%