290.98% is the change from 255 to 997
Calculation steps:
[( 997 - 255 ) ÷ 255] x 100 = 290.98%
Formula
Percentage change = [(997 - 255) / 255] x 100
Subtract the new number by the original number
997 - 255 = 742
742 ÷ 255 = 2.9098039215686273
2.9098039215686273 x 100 = 290.98%