Answer:
The answer is [tex]\frac{18}{20}[/tex] and [tex]\frac{27}{30}[/tex]
Step-by-step explanation:
A multiple of any fraction number is the amplifyng of the base fraction with a same integer number, excluding the number zero, both in the numerator and in the denominator.
Give a fraction number [tex]\frac{x}{y}[/tex]
A Multiple is [tex]\frac{n*x}{n*y}[/tex], where n is an integer without zero
So, using n=2 and n=3
For n=2, [tex]\frac{2*9}{2*10} =\frac{18}{20}[/tex]
For n=3, [tex]\frac{3*9}{3*10} =\frac{27}{30}[/tex]
