243.36% is the change from 256 to 879
Calculation steps:
[( 879 - 256 ) ÷ 256] x 100 = 243.36%
Formula
Percentage change = [(879 - 256) / 256] x 100
Subtract the new number by the original number
879 - 256 = 623
623 ÷ 256 = 2.43359375
2.43359375 x 100 = 243.36%