-96.22% is the change from 502 to 19
Calculation steps:
[( 19 - 502 ) ÷ 502] x 100 = -96.22%
Formula
Percentage change = [(19 - 502) / 502] x 100
Subtract the new number by the original number
19 - 502 = -483
-483 ÷ 502 = -0.9621513944223108
-0.9621513944223108 x 100 = -96.22%