12.66% is the change from 308 to 347
Calculation steps:
[( 347 - 308 ) ÷ 308] x 100 = 12.66%
Formula
Percentage change = [(347 - 308) / 308] x 100
Subtract the new number by the original number
347 - 308 = 39
39 ÷ 308 = 0.1266233766233766
0.1266233766233766 x 100 = 12.66%