-22.02% is the change from 840 to 655
Calculation steps:
[( 655 - 840 ) ÷ 840] x 100 = -22.02%
Formula
Percentage change = [(655 - 840) / 840] x 100
Subtract the new number by the original number
655 - 840 = -185
-185 ÷ 840 = -0.22023809523809523
-0.22023809523809523 x 100 = -22.02%