231.64% is the change from 256 to 849
Calculation steps:
[( 849 - 256 ) ÷ 256] x 100 = 231.64%
Formula
Percentage change = [(849 - 256) / 256] x 100
Subtract the new number by the original number
849 - 256 = 593
593 ÷ 256 = 2.31640625
2.31640625 x 100 = 231.64%