Suppose you have mixed fraction of the form ab/c
Then multiply the whole part, a, by the denominator, c, of the fractional part and add the numerator, b. This is the numerator of the improper fraction.
The denominator of the improper fraction is the same as the original denominator, c.
So, a b/c = (ac + b)/c
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You can't. Improper and proper fractions are two different things. You can convert an improper fraction to a mixed number.
WE just have to check if the numerator is greater than the denominator. Eg: 8/3 is an improper fraction. Every mixed fraction is an improper fraction.
I wouldconvert both to improper fraction,find a common multiple (CM),calculate equivalent fraction with CM as the denominator,add the numerators,change the improper fraction to a mixed fraction, if required,simplify the fractional part of the mixed fraction - if appropriate and required.
It is best to convert the mixed fraction to an improper fraction. They are then added together in the same way as proper fractions are added together.
You take the bottom number and divided by the top number.