tolong dijawab ya 4 dan 5

4.
[tex] \frac{3}{5} \div \frac{1}{7} = \frac{3}{5} \times \frac{7}{1} = \frac{21}{5} = 4 \frac{1}{5} [/tex]
5.
[tex]5 \frac{4}{5} \times 2 \frac{3}{7} = \frac{29}{5} \times \frac{17}{7} = \frac{493}{35} = 14[/tex]