-87.45% is the change from 502 to 63
Calculation steps:
[( 63 - 502 ) ÷ 502] x 100 = -87.45%
Formula
Percentage change = [(63 - 502) / 502] x 100
Subtract the new number by the original number
63 - 502 = -439
-439 ÷ 502 = -0.8745019920318725
-0.8745019920318725 x 100 = -87.45%