Question

# Express $\frac{-42}{98}$ as a rational number with denominator 7.

Solution

## If $\frac{a}{b}$ is a rational number and $m$ is a common divisor of , then $\frac{a}{b}=\frac{a÷m}{b÷m}$. ∴ $\frac{-42}{98}=\frac{-42÷14}{98÷14}=\frac{-3}{7}$MathematicsRS Aggarwal (2016)Standard VIII

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