Use multiples to write two fractions equivalent to 9/10

The answer is and

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

A Multiple is , where n is an integer without zero

So, using n=2 and n=3

For n=2,

For n=3,

step-by-step explanation:

b and c