-23.03% is the change from 621 to 478
Calculation steps:
[( 478 - 621 ) ÷ 621] x 100 = -23.03%
Formula
Percentage change = [(478 - 621) / 621] x 100
Subtract the new number by the original number
478 - 621 = -143
-143 ÷ 621 = -0.23027375201288244
-0.23027375201288244 x 100 = -23.03%