3/7 is a fraction and Other uses for fractions are to represent ratios and division. 3
/
7
is also used to represent the ratio 3:7 (the ratio of the part to the whole) and the division 3 ÷ 7 (three divided by seven). The non-zero denominator in the case using a fraction to represent division is an example of the rule that division by zero is undefined.
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