-19.43% is the change from 628 to 506
Calculation steps:
[( 506 - 628 ) ÷ 628] x 100 = -19.43%
Formula
Percentage change = [(506 - 628) / 628] x 100
Subtract the new number by the original number
506 - 628 = -122
-122 ÷ 628 = -0.1942675159235669
-0.1942675159235669 x 100 = -19.43%