It would be an improper fraction.
You take the bottom number and divided by the top number.
You do the numerator divided by the denominator, then simplify the fractions if you can. (this is how you change a improper fraction to a mixed number, you cannot change a proper fraction to a mixed number)
Improper Fraction.
First you would want to change the mixed number to an improper fraction. Then you can subtract
numerator divded by denominator (top number divided by bottomP)
As an improper fraction, it is 5/4. The equivalent mixed fraction is 1 1/4.
A mixed number can be converted into an improper fraction. Mixed numbers as improper fractions can be divided just like any other fraction. To convert a mixed number to an improper fraction multiply the whole number by the denominator and add the original numerator to give the new numerator and put this over the original denominator.
9.6
5.6667
it is fraction with the numerator greater than or equal to the denominator
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.