-19.81% is the change from 621 to 498
Calculation steps:
[( 498 - 621 ) ÷ 621] x 100 = -19.81%
Formula
Percentage change = [(498 - 621) / 621] x 100
Subtract the new number by the original number
498 - 621 = -123
-123 ÷ 621 = -0.19806763285024154
-0.19806763285024154 x 100 = -19.81%