1.5 is a fraction. It is a fraction in decimal form rather than in the form of a ratio. However, that does not stop it being a fraction. Its rational equivalent is 1 1/2.
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To express 15 as a mixed fraction, we divide 15 by the whole number it can be divided by evenly, which is 1. This gives us 15 divided by 1, which equals 15. Therefore, 15 as a mixed fraction is 15 0/1.
15/7 is an improper fraction. It can be re-written as the mixed number: (2 and 1/7)
To write 7.15 as a mixed number, you can break it down into a whole number and a fraction. The whole number is 7, and the fraction part is 15/100. Simplifying the fraction gives you 3/20. Therefore, 7.15 can be written as the mixed number 7 3/20 or the improper fraction 143/20.
15 38/100 is the mixed number 15 38/100 = 1538/100
If you write it as 15 2/3, that is a mixed fraction.