276.56% is the change from 256 to 964
Calculation steps:
[( 964 - 256 ) ÷ 256] x 100 = 276.56%
Formula
Percentage change = [(964 - 256) / 256] x 100
Subtract the new number by the original number
964 - 256 = 708
708 ÷ 256 = 2.765625
2.765625 x 100 = 276.56%