-33.57% is the change from 840 to 558
Calculation steps:
[( 558 - 840 ) ÷ 840] x 100 = -33.57%
Formula
Percentage change = [(558 - 840) / 840] x 100
Subtract the new number by the original number
558 - 840 = -282
-282 ÷ 840 = -0.3357142857142857
-0.3357142857142857 x 100 = -33.57%