Question

5/1x8/9=

Answer 1

That's just 40/9

Answer 2

$$\Huge\frac{a}{b}*\frac{c}{d}=\frac{a*c}{b*d}$$

$$\Huge\frac{5}{1}*\frac{8}{9}=\frac{5*8}{1*9}$$

To multiply fractions,
you multiply their numerators
and
multiply their denominators.