309.76% is the change from 82 to 336
Calculation steps:
[( 336 - 82 ) ÷ 82] x 100 = 309.76%
Formula
Percentage change = [(336 - 82) / 82] x 100
Subtract the new number by the original number
336 - 82 = 254
254 ÷ 82 = 3.097560975609756
3.097560975609756 x 100 = 309.76%