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Express the Following Decimal as a Rational Number. 0.763 - Mathematics

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Question

Express the following decimal as a rational number.

0.763

Sum

Solution

Let x = 0.763
Then, x = 0.763763.....       .....(1)
Here, the number of digits recurring is 3, so we multiply both sides of the equation (1) by 1000.
∴1000x = 1000 x 0.763763....
= 763.763.....        ....(2)
On subtracting (1) from (2), we get
999x = 763

∴ x = `(763)/(999)`

∴ 0.763 = `(763)/(999)`

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Chapter 1: Irrational Numbers - Exercise 1.1

APPEARS IN

Frank Mathematics [English] Class 9 ICSE
Chapter 1 Irrational Numbers
Exercise 1.1 | Q 4.5
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