-20% is the change from 570 to 456
Calculation steps:
[( 456 - 570 ) ÷ 570] x 100 = -20%
Formula
Percentage change = [(456 - 570) / 570] x 100
Subtract the new number by the original number
456 - 570 = -114
-114 ÷ 570 = -0.2
-0.2 x 100 = -20%
Example