-22.31% is the change from 502 to 390
Calculation steps:
[( 390 - 502 ) ÷ 502] x 100 = -22.31%
Formula
Percentage change = [(390 - 502) / 502] x 100
Subtract the new number by the original number
390 - 502 = -112
-112 ÷ 502 = -0.22310756972111553
-0.22310756972111553 x 100 = -22.31%