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प्रश्न
Find the unknowns x, y and z.
| Name of the item | Marked Price | Selling Price | Discount |
| Book | ₹ 225 | x | 8% |
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उत्तर
Book marked price = ₹ 225 discount 8%
∴ Selling price (x) = `"Marked price" xx (((100 - "d"%))/100)`
= `225 xx ((100 - 8))/100`
= `225 xx 92/100`
= ₹ 207
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