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Question

Express $$\dfrac{3}{4}$$ as a rational number with denominator:
$$-80$$


Solution

In the fraction $$\dfrac34$$ the denominator is equal to $$4$$ and we want that denominator to be equal to $$-80.$$

Let we will have to multiply $$x$$ in the numerator and the denominator of the fraction $$\dfrac34$$ to make denominator equal to $$-80.$$ So,
$$4\times x = -80$$
$$\Rightarrow x=-20$$

Hence,
$$\begin{aligned}{}\frac{3}4 &= \frac{{3 \times  - 20}}{{4 \times  - 20}}\\ \\&= \frac{{ - 60}}{{ - 80}}\end{aligned}$$

Mathematics

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