218.75% is the change from 80 to 255
Calculation steps:
[( 255 - 80 ) ÷ 80] x 100 = 218.75%
Formula
Percentage change = [(255 - 80) / 80] x 100
Subtract the new number by the original number
255 - 80 = 175
175 ÷ 80 = 2.1875
2.1875 x 100 = 218.75%
Example