4.5=4 1/2 or 9/2.
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It is: 45 and a 1/2 A mixed number is a whole number with a fraction. Since 45.5 equals 45 and 1/2, it is a whole number with a fraction, making it a mixed number.
45/22 is already an improper fraction. As a mixed number, it is 2 1/22.
The easiest way to do that is to say to yourself, as you look at the fraction, "Now I remember ! A fraction means division." Then divide 45 by 25, and the quotient is the mixed number that you want.
3.75
A mixed number