First convert the mixed fraction into an improper fraction. To do this, multiply the whole number by the denominator and then add the numerator. Then place it over the denominator.
4 1/2 => 9/2
Now we can multiply.
9/2 * 3/4 = 27/8
Now convert it into a mixed number.
To do this, first find how many times 8 can go into 27. Which is 3 times.
That will be our whole number. 3 * 8 = 24
Then subtract 24 from 27. 27 - 24 = 3. That will be our numerator.
And the 8 will in 27/8 will be our denominator.
And the result is 3 3/8