-28.21% is the change from 840 to 603
Calculation steps:
[( 603 - 840 ) ÷ 840] x 100 = -28.21%
Formula
Percentage change = [(603 - 840) / 840] x 100
Subtract the new number by the original number
603 - 840 = -237
-237 ÷ 840 = -0.28214285714285714
-0.28214285714285714 x 100 = -28.21%