87.5 as a mixed number is 87 5/10 or 87 1/2 in simplest form. As an improper fraction it is 1875/10.
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This can be written as 1 + 875/1000, then simplify the fraction 875/1000 to 7/8, so 1 7/8
4 and 7/8
A number can be called either a mixed number or a mixed fraction when it is a whole number with a fraction.
By changing the mixed number into an improper fraction.
It is called a mixed number or a mixed fraction.