8.7% is the change from 391 to 425
Calculation steps:
[( 425 - 391 ) ÷ 391] x 100 = 8.7%
Formula
Percentage change = [(425 - 391) / 391] x 100
Subtract the new number by the original number
425 - 391 = 34
34 ÷ 391 = 0.08695652173913043
0.08695652173913043 x 100 = 8.7%