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Fractions Less Than Seven Ninths

1000BeginnerAlgebraNumber Theory

Brazilian Mathematical Olympiad

What is the smallest fraction? How many fractions of the form $\frac{n}{n+1}$ are less than $\frac{7}{9}$, given that $n$ is a positive integer? (a) 1 (b) 2 (c) 3 (d) 4 (e) 5
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