268.63% is the change from 255 to 940
Calculation steps:
[( 940 - 255 ) ÷ 255] x 100 = 268.63%
Formula
Percentage change = [(940 - 255) / 255] x 100
Subtract the new number by the original number
940 - 255 = 685
685 ÷ 255 = 2.6862745098039214
2.6862745098039214 x 100 = 268.63%