11% is the change from 391 to 434
Calculation steps:
[( 434 - 391 ) ÷ 391] x 100 = 11%
Formula
Percentage change = [(434 - 391) / 391] x 100
Subtract the new number by the original number
434 - 391 = 43
43 ÷ 391 = 0.10997442455242967
0.10997442455242967 x 100 = 11%