8.74% is the change from 309 to 336
Calculation steps:
[( 336 - 309 ) ÷ 309] x 100 = 8.74%
Formula
Percentage change = [(336 - 309) / 309] x 100
Subtract the new number by the original number
336 - 309 = 27
27 ÷ 309 = 0.08737864077669903
0.08737864077669903 x 100 = 8.74%