318.75% is the change from 80 to 335
Calculation steps:
[( 335 - 80 ) ÷ 80] x 100 = 318.75%
Formula
Percentage change = [(335 - 80) / 80] x 100
Subtract the new number by the original number
335 - 80 = 255
255 ÷ 80 = 3.1875
3.1875 x 100 = 318.75%
Example