-32.14% is the change from 840 to 570
Calculation steps:
[( 570 - 840 ) ÷ 840] x 100 = -32.14%
Formula
Percentage change = [(570 - 840) / 840] x 100
Subtract the new number by the original number
570 - 840 = -270
-270 ÷ 840 = -0.32142857142857145
-0.32142857142857145 x 100 = -32.14%