-1.21% is the change from 577 to 570
Calculation steps:
[( 570 - 577 ) ÷ 577] x 100 = -1.21%
Formula
Percentage change = [(570 - 577) / 577] x 100
Subtract the new number by the original number
570 - 577 = -7
-7 ÷ 577 = -0.012131715771230503
-0.012131715771230503 x 100 = -1.21%