-19.55% is the change from 624 to 502
Calculation steps:
[( 502 - 624 ) ÷ 624] x 100 = -19.55%
Formula
Percentage change = [(502 - 624) / 624] x 100
Subtract the new number by the original number
502 - 624 = -122
-122 ÷ 624 = -0.1955128205128205
-0.1955128205128205 x 100 = -19.55%