In order to write 19/5 as a mixed number in simplest form (sometimes people will say "as a whole number" or "mixed fraction"), we can follow a few steps.
Note that 19/5 is already simplified (in lowest terms). So we can't reduce or simplify 19/5 any further. But we can write is as a mixed number.
First, we can divide the numerator (19) by the denominator (5). 5 goes into 19 a total of 3 times with a remainder of 4.
Second, we take the remainder and put it over the original denominator. This gives us 4/5.
For the mixed number, we have the whole number 3 and the fraction (from the remainder) of 4/5.
So 19/5 written as a mixed number is 3 4/5 (three and four-fifths).
To check your work, you can now multiply the whole number in the mixed fraction by the denominator (3 x 5) and add this to the numerator (the 4 in the 4/5), and you will get 19/5. This is a good way to check that you have the right mixed fraction.
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