263.67% is the change from 256 to 931
Calculation steps:
[( 931 - 256 ) ÷ 256] x 100 = 263.67%
Formula
Percentage change = [(931 - 256) / 256] x 100
Subtract the new number by the original number
931 - 256 = 675
675 ÷ 256 = 2.63671875
2.63671875 x 100 = 263.67%