167.19% is the change from 256 to 684
Calculation steps:
[( 684 - 256 ) ÷ 256] x 100 = 167.19%
Formula
Percentage change = [(684 - 256) / 256] x 100
Subtract the new number by the original number
684 - 256 = 428
428 ÷ 256 = 1.671875
1.671875 x 100 = 167.19%