-36.23% is the change from 621 to 396
Calculation steps:
[( 396 - 621 ) ÷ 621] x 100 = -36.23%
Formula
Percentage change = [(396 - 621) / 621] x 100
Subtract the new number by the original number
396 - 621 = -225
-225 ÷ 621 = -0.36231884057971014
-0.36231884057971014 x 100 = -36.23%