-1.77% is the change from 621 to 610
Calculation steps:
[( 610 - 621 ) ÷ 621] x 100 = -1.77%
Formula
Percentage change = [(610 - 621) / 621] x 100
Subtract the new number by the original number
610 - 621 = -11
-11 ÷ 621 = -0.017713365539452495
-0.017713365539452495 x 100 = -1.77%