-50.6% is the change from 502 to 248
Calculation steps:
[( 248 - 502 ) ÷ 502] x 100 = -50.6%
Formula
Percentage change = [(248 - 502) / 502] x 100
Subtract the new number by the original number
248 - 502 = -254
-254 ÷ 502 = -0.5059760956175299
-0.5059760956175299 x 100 = -50.6%