161.96% is the change from 255 to 668
Calculation steps:
[( 668 - 255 ) ÷ 255] x 100 = 161.96%
Formula
Percentage change = [(668 - 255) / 255] x 100
Subtract the new number by the original number
668 - 255 = 413
413 ÷ 255 = 1.619607843137255
1.619607843137255 x 100 = 161.96%