-6.94% is the change from 620 to 577
Calculation steps:
[( 577 - 620 ) ÷ 620] x 100 = -6.94%
Formula
Percentage change = [(577 - 620) / 620] x 100
Subtract the new number by the original number
577 - 620 = -43
-43 ÷ 620 = -0.06935483870967742
-0.06935483870967742 x 100 = -6.94%