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Question
Find the reciprocal of the following:
`20/51 xx 4/91`
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Solution
Given, `20/51 xx 4/91`
= `(20 xx 4)/(51 xx 91)` ...`[∵ "Product of rational numbers" = "Product of numerators"/"Product of denominators"]`
= `80/4641`
Hence, the reciprocal of `80/4641` is `4641/80`.
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