-90.04% is the change from 502 to 50
Calculation steps:
[( 50 - 502 ) ÷ 502] x 100 = -90.04%
Formula
Percentage change = [(50 - 502) / 502] x 100
Subtract the new number by the original number
50 - 502 = -452
-452 ÷ 502 = -0.900398406374502
-0.900398406374502 x 100 = -90.04%