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Unitary Method

What will be ...

Question

What will be the list price of an article which is sold for $R s . y$ after giving a discount of $x %$ ?

\frac{100 y}{100 - x}

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\frac{100 y}{1 - x}

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\frac{100 y}{1 - (x / 100)}

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N o n e o f t h e s e

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Solution

The correct option is A $\frac{100 y}{100 - x}$
Let the list price be Rs. $z$ .
$∴$ $(100 - x) %$ of $z = y$
$\Rightarrow (\frac{100 - x}{100}) \times z = y$
$\Rightarrow z = (\frac{100 y}{100 - x})$

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