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Question

Express the following recurring decimals as fractions.

0.13


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Solution

Given, 0.13

Let x=0.13=0.13333.....(i)

Multiplying both the sides by 10 we get

10x=1.333....(ii)

Subtracting (i) from (ii) we get

10x-x=1.333...-0.13333.....9x=1.2x=1.29x=1210×19=1290=215

Hence, 0.13=215


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