160.16% is the change from 256 to 666
Calculation steps:
[( 666 - 256 ) ÷ 256] x 100 = 160.16%
Formula
Percentage change = [(666 - 256) / 256] x 100
Subtract the new number by the original number
666 - 256 = 410
410 ÷ 256 = 1.6015625
1.6015625 x 100 = 160.16%