EX:
3 3/4 x 4 4/10
first, you multiply 4x3, then you get 12 + 3=15/4
second, you multiply 10x4=40+4=44/10
then you multiply the denomanator by the denomanator and the numerator by the numerator.
15x44=
10x4=
Then simplify your answer.
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Yes, mixed fractions are rational
you have to turn them into improper fractions before you multiply them.
To find the sum of two mixed numbers, turn the mixed numbers into improper fractions (multiply the base with the denominator and add the numerator), then add the two fractions. To add the two fractions, find the LCD (lowest common denominator) and add the two numerators, but leave the denominators the same.
If doing it without a calculator, then convert each mixed fraction into a top-heavy equivalent fraction and then multiply as for fractions.
To combine the fractions or subtract the fractions. Same method with mixed numbers.