-28.93% is the change from 840 to 597
Calculation steps:
[( 597 - 840 ) ÷ 840] x 100 = -28.93%
Formula
Percentage change = [(597 - 840) / 840] x 100
Subtract the new number by the original number
597 - 840 = -243
-243 ÷ 840 = -0.2892857142857143
-0.2892857142857143 x 100 = -28.93%