On decreasing a number by $18$ %, it becomes $697$ . Find the number.

850

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847

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854

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865

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Solution

The correct option is C 850
Let $x$ be the number.
Hence, decreasing by $18 % \Rightarrow 82 % o f x$
i.e $\frac{82}{100} x = 697$
$x = 850$ is the number.

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