Hej!
a]
[tex]2 \div \frac{3}{5} = 2 \times \frac{5}{3} = \frac{10}{3} = 3 \frac{1}{3} [/tex]
b]
[tex]4 \frac{1}{6} \div 15 = \frac{25}{6} \times \frac{1}{15} = \frac{5}{18} [/tex]
c]
[tex]1 \frac{3}{4} \div 1 \frac{1}{2} = \frac{7}{4} \div \frac{3}{2} = \frac{7}{4} \times \frac{2}{3} = \frac{7}{6} = 1 \frac{1}{6} [/tex]