260% is the change from 255 to 918
Calculation steps:
[( 918 - 255 ) ÷ 255] x 100 = 260%
Formula
Percentage change = [(918 - 255) / 255] x 100
Subtract the new number by the original number
918 - 255 = 663
663 ÷ 255 = 2.6
2.6 x 100 = 260%
Example