-19.65% is the change from 621 to 499
Calculation steps:
[( 499 - 621 ) ÷ 621] x 100 = -19.65%
Formula
Percentage change = [(499 - 621) / 621] x 100
Subtract the new number by the original number
499 - 621 = -122
-122 ÷ 621 = -0.1964573268921095
-0.1964573268921095 x 100 = -19.65%