-51.2% is the change from 502 to 245
Calculation steps:
[( 245 - 502 ) ÷ 502] x 100 = -51.2%
Formula
Percentage change = [(245 - 502) / 502] x 100
Subtract the new number by the original number
245 - 502 = -257
-257 ÷ 502 = -0.5119521912350598
-0.5119521912350598 x 100 = -51.2%