Question

how to solve fraction multiplication

Answer 1

By cross multiplication you can solve fraction multiplication in easy way.

Answer 2

Fraction multiplication is simple.

For example
$\frac{x}{y} \times \frac{a}{b} = \frac{x \times a}{y \times b}$
another example,
$\frac{1}{2} \times \frac{2}{3} = \frac{2}{6} \\ = \frac{1}{3}$
I hope this helps.