287.45% is the change from 255 to 988
Calculation steps:
[( 988 - 255 ) ÷ 255] x 100 = 287.45%
Formula
Percentage change = [(988 - 255) / 255] x 100
Subtract the new number by the original number
988 - 255 = 733
733 ÷ 255 = 2.8745098039215686
2.8745098039215686 x 100 = 287.45%