-51.29% is the change from 503 to 245
Calculation steps:
[( 245 - 503 ) ÷ 503] x 100 = -51.29%
Formula
Percentage change = [(245 - 503) / 503] x 100
Subtract the new number by the original number
245 - 503 = -258
-258 ÷ 503 = -0.5129224652087475
-0.5129224652087475 x 100 = -51.29%