-34.62% is the change from 621 to 406
Calculation steps:
[( 406 - 621 ) ÷ 621] x 100 = -34.62%
Formula
Percentage change = [(406 - 621) / 621] x 100
Subtract the new number by the original number
406 - 621 = -215
-215 ÷ 621 = -0.3462157809983897
-0.3462157809983897 x 100 = -34.62%