-97.81% is the change from 502 to 11
Calculation steps:
[( 11 - 502 ) ÷ 502] x 100 = -97.81%
Formula
Percentage change = [(11 - 502) / 502] x 100
Subtract the new number by the original number
11 - 502 = -491
-491 ÷ 502 = -0.9780876494023905
-0.9780876494023905 x 100 = -97.81%