167.58% is the change from 256 to 685
Calculation steps:
[( 685 - 256 ) ÷ 256] x 100 = 167.58%
Formula
Percentage change = [(685 - 256) / 256] x 100
Subtract the new number by the original number
685 - 256 = 429
429 ÷ 256 = 1.67578125
1.67578125 x 100 = 167.58%