-48.91% is the change from 503 to 257
Calculation steps:
[( 257 - 503 ) ÷ 503] x 100 = -48.91%
Formula
Percentage change = [(257 - 503) / 503] x 100
Subtract the new number by the original number
257 - 503 = -246
-246 ÷ 503 = -0.48906560636182905
-0.48906560636182905 x 100 = -48.91%