-21.91% is the change from 502 to 392
Calculation steps:
[( 392 - 502 ) ÷ 502] x 100 = -21.91%
Formula
Percentage change = [(392 - 502) / 502] x 100
Subtract the new number by the original number
392 - 502 = -110
-110 ÷ 502 = -0.21912350597609562
-0.21912350597609562 x 100 = -21.91%