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By What Rational Number Should We Multiply 20/-9, So that the Product May Be (-5)/9? - Mathematics

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Question

By what rational number should we multiply `20/-9`, so that the product may be `(-5)/9`?

Sum

Solution

Required number = `(-5)/9 div (20/-9)`

`=> (-5)/9 xx ((-9)/20) = 1/4`

∴ Required number = `1/4`

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Concept for Problem Solving Using Operations on Rational Numbers
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Chapter 2: Rational Numbers - Exercise 2 (E)

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Selina Concise Mathematics [English] Class 7 ICSE
Chapter 2 Rational Numbers
Exercise 2 (E) | Q 10
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