260.78% is the change from 255 to 920
Calculation steps:
[( 920 - 255 ) ÷ 255] x 100 = 260.78%
Formula
Percentage change = [(920 - 255) / 255] x 100
Subtract the new number by the original number
920 - 255 = 665
665 ÷ 255 = 2.607843137254902
2.607843137254902 x 100 = 260.78%