214.06% is the change from 256 to 804
Calculation steps:
[( 804 - 256 ) ÷ 256] x 100 = 214.06%
Formula
Percentage change = [(804 - 256) / 256] x 100
Subtract the new number by the original number
804 - 256 = 548
548 ÷ 256 = 2.140625
2.140625 x 100 = 214.06%