Answer
39%
Work Step by Step
Convert all the number in to minute unit
10 hours 11 minutes = 10(60)+11=611 minutes
14 hours 7 minutes= 14(60)+7=847 minutes
percent increase formula : $\frac{Difference}{Original}$$\times$100
$\frac{847-611}{611}$$\times$100=$\frac{236}{611}$$\times$100=0.39$\times$100=39%