91.76% is the change from 255 to 489
Calculation steps:
[( 489 - 255 ) ÷ 255] x 100 = 91.76%
Formula
Percentage change = [(489 - 255) / 255] x 100
Subtract the new number by the original number
489 - 255 = 234
234 ÷ 255 = 0.9176470588235294
0.9176470588235294 x 100 = 91.76%