-6.76% is the change from 621 to 579
Calculation steps:
[( 579 - 621 ) ÷ 621] x 100 = -6.76%
Formula
Percentage change = [(579 - 621) / 621] x 100
Subtract the new number by the original number
579 - 621 = -42
-42 ÷ 621 = -0.06763285024154589
-0.06763285024154589 x 100 = -6.76%