Dividing Fractions

Question 1:

\frac{7}{45} \div \frac{77}{81}

\frac{{}^{1}7}{{}_{5}45} \times \frac{81^{9}}{77_{11}} = \frac{9}{55}

Question 2:

\frac{25}{72} \div \frac{40}{63}

\frac{{}^{5}25}{{}_{8}72} \times \frac{63^{7}}{40_{8}} = \frac{35}{64}

Question 3:

\frac{25}{49} \div \frac{25}{28}

\frac{{}^{1}25}{{}_{7}49} \times \frac{28^{4}}{25_{1}} = \frac{4}{7}

Question 4:

\frac{4}{15} \div \frac{18}{25}

\frac{{}^{2}4}{{}_{3}15} \times \frac{25^{5}}{18_{9}} = \frac{10}{27}