-42.42% is the change from 990 to 570
Calculation steps:
[( 570 - 990 ) ÷ 990] x 100 = -42.42%
Formula
Percentage change = [(570 - 990) / 990] x 100
Subtract the new number by the original number
570 - 990 = -420
-420 ÷ 990 = -0.42424242424242425
-0.42424242424242425 x 100 = -42.42%