You don't. That number is less than one. A mixed fraction, by definition, is a number greater than one. More precisely, a mixed fraction is one way of writing such a number.
The mixed number for the fraction 24 over 18 is 1 and 1/3
18/12 is an improper fraction. It's equivalent to the mixed number 1.5 .
3... Don't cheat
A mixed number can be formed only when the numerator of the fraction is greater than the denominator. That is, when the fraction is an improper fraction. 18/52 cannot be converted into a mixed number but it can be simplified as both the numerator and denominator are divisible by 2. 18/52 = 9/26
18 over 25
55/3 = 18 1/3.
18/45 is a proper fraction. It can be simplified to 2/5.
It is: 18/5 = 36/10 which as a mixed number is 3 and 3/5
18 over 3 or 18/3
15 18/100
18 is an integer, not a fraction. There is not really a sensible way of writing it as a fraction or mixed number. However, if you must, you can use 18/1.
18.125 = 18 1/8