96.48% is the change from 256 to 503
Calculation steps:
[( 503 - 256 ) ÷ 256] x 100 = 96.48%
Formula
Percentage change = [(503 - 256) / 256] x 100
Subtract the new number by the original number
503 - 256 = 247
247 ÷ 256 = 0.96484375
0.96484375 x 100 = 96.48%