-17.7% is the change from 610 to 502
Calculation steps:
[( 502 - 610 ) ÷ 610] x 100 = -17.7%
Formula
Percentage change = [(502 - 610) / 610] x 100
Subtract the new number by the original number
502 - 610 = -108
-108 ÷ 610 = -0.17704918032786884
-0.17704918032786884 x 100 = -17.7%