-97.61% is the change from 502 to 12
Calculation steps:
[( 12 - 502 ) ÷ 502] x 100 = -97.61%
Formula
Percentage change = [(12 - 502) / 502] x 100
Subtract the new number by the original number
12 - 502 = -490
-490 ÷ 502 = -0.9760956175298805
-0.9760956175298805 x 100 = -97.61%