8.2% is the change from 305 to 330
Calculation steps:
[( 330 - 305 ) ÷ 305] x 100 = 8.2%
Formula
Percentage change = [(330 - 305) / 305] x 100
Subtract the new number by the original number
330 - 305 = 25
25 ÷ 305 = 0.08196721311475409
0.08196721311475409 x 100 = 8.2%