-14.14% is the change from 502 to 431
Calculation steps:
[( 431 - 502 ) ÷ 502] x 100 = -14.14%
Formula
Percentage change = [(431 - 502) / 502] x 100
Subtract the new number by the original number
431 - 502 = -71
-71 ÷ 502 = -0.14143426294820718
-0.14143426294820718 x 100 = -14.14%