270.31% is the change from 256 to 948
Calculation steps:
[( 948 - 256 ) ÷ 256] x 100 = 270.31%
Formula
Percentage change = [(948 - 256) / 256] x 100
Subtract the new number by the original number
948 - 256 = 692
692 ÷ 256 = 2.703125
2.703125 x 100 = 270.31%