314.81% is the change from 81 to 336
Calculation steps:
[( 336 - 81 ) ÷ 81] x 100 = 314.81%
Formula
Percentage change = [(336 - 81) / 81] x 100
Subtract the new number by the original number
336 - 81 = 255
255 ÷ 81 = 3.1481481481481484
3.1481481481481484 x 100 = 314.81%