$2\frac{1}{3}= 2+ \frac{1}{3}= \frac{2\times 3+ 1}{3}=\frac{7}{3}$
$4\frac{2}{5}= 4+ \frac{2}{5}= \frac{4\times 5+ 2}{5}=\frac{22}{5}$
$3\frac{1}{4}= 3+\frac{1}{4}= \frac{3\times 4+ 1}{4}=\frac{13}{4}$
$9\frac{5}{7}= 9+ \frac{5}{7}= \frac{9\times 7+5}{7}=\frac{68}{7}$
$10\frac{3}{10}= 10+\frac{3}{10}= \frac{10\times 10+ 3}{10}=\frac{103}{10}$