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.
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7.015 = 715/1000 = 73/200 which cannot be simplified further.
7.15 as a fraction = 715/100 or 143/20
7 and 15/100 or 715/100
715/1000
Neither of them are fractions, they are both integers. 715 is bigger.