254.3% is the change from 256 to 907
Calculation steps:
[( 907 - 256 ) ÷ 256] x 100 = 254.3%
Formula
Percentage change = [(907 - 256) / 256] x 100
Subtract the new number by the original number
907 - 256 = 651
651 ÷ 256 = 2.54296875
2.54296875 x 100 = 254.3%