3.25% is the change from 308 to 318
Calculation steps:
[( 318 - 308 ) ÷ 308] x 100 = 3.25%
Formula
Percentage change = [(318 - 308) / 308] x 100
Subtract the new number by the original number
318 - 308 = 10
10 ÷ 308 = 0.032467532467532464
0.032467532467532464 x 100 = 3.25%