-18.43% is the change from 624 to 509
Calculation steps:
[( 509 - 624 ) ÷ 624] x 100 = -18.43%
Formula
Percentage change = [(509 - 624) / 624] x 100
Subtract the new number by the original number
509 - 624 = -115
-115 ÷ 624 = -0.1842948717948718
-0.1842948717948718 x 100 = -18.43%