204.31% is the change from 255 to 776
Calculation steps:
[( 776 - 255 ) ÷ 255] x 100 = 204.31%
Formula
Percentage change = [(776 - 255) / 255] x 100
Subtract the new number by the original number
776 - 255 = 521
521 ÷ 255 = 2.0431372549019606
2.0431372549019606 x 100 = 204.31%