270.7% is the change from 256 to 949
Calculation steps:
[( 949 - 256 ) ÷ 256] x 100 = 270.7%
Formula
Percentage change = [(949 - 256) / 256] x 100
Subtract the new number by the original number
949 - 256 = 693
693 ÷ 256 = 2.70703125
2.70703125 x 100 = 270.7%