18.36% is the change from 256 to 303
Calculation steps:
[( 303 - 256 ) ÷ 256] x 100 = 18.36%
Formula
Percentage change = [(303 - 256) / 256] x 100
Subtract the new number by the original number
303 - 256 = 47
47 ÷ 256 = 0.18359375
0.18359375 x 100 = 18.36%