9.72% is the change from 391 to 429
Calculation steps:
[( 429 - 391 ) ÷ 391] x 100 = 9.72%
Formula
Percentage change = [(429 - 391) / 391] x 100
Subtract the new number by the original number
429 - 391 = 38
38 ÷ 391 = 0.09718670076726342
0.09718670076726342 x 100 = 9.72%