96.88% is the change from 256 to 504
Calculation steps:
[( 504 - 256 ) ÷ 256] x 100 = 96.88%
Formula
Percentage change = [(504 - 256) / 256] x 100
Subtract the new number by the original number
504 - 256 = 248
248 ÷ 256 = 0.96875
0.96875 x 100 = 96.88%