269.92% is the change from 256 to 947
Calculation steps:
[( 947 - 256 ) ÷ 256] x 100 = 269.92%
Formula
Percentage change = [(947 - 256) / 256] x 100
Subtract the new number by the original number
947 - 256 = 691
691 ÷ 256 = 2.69921875
2.69921875 x 100 = 269.92%