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Rational Numbers — Maths STD 8 — Question

Maharashtra BoardEnglish MediumSTD 8MathsRational Numbers2 Marks
Question
Multiply:
$\frac{-5}{17}\ \text{by}\ \frac{51}{-60}$
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Answer

$\frac{-5}{17}\ \text{by}\ \frac{51}{-60}$
$\frac{-5}{17}\times\frac{-51}{60}$
$\Big(\frac{51}{-60}=\frac{51\times(-1)}{-60\times(-1)}=\frac{-51}{60}\Big)$
$=\frac{(-5)\times(-51)}{17\times60}=\frac{255}{1020}=\frac{255\div255}{1020\div255}$
$=\frac{1}{4}$

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