160.94% is the change from 256 to 668
Calculation steps:
[( 668 - 256 ) ÷ 256] x 100 = 160.94%
Formula
Percentage change = [(668 - 256) / 256] x 100
Subtract the new number by the original number
668 - 256 = 412
412 ÷ 256 = 1.609375
1.609375 x 100 = 160.94%