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An item marked at 840 is sold for 714. The discount per cent is:
A12%
B18%
C15%
D20%
Answer & Solution
Correct answer: C. 15%
1. The discount in rupees is marked price minus sale price.
2. That is 840 - 714 = 126.
3. Discount per cent is always taken on the marked price as the base.
4. So it is 126 / 840 x 100.
5. That gives 15 per cent. Dividing by the sale price instead would wrongly give about 17.6 per cent.
_Source: NCERT Class 8 Maths, Ch 7 'Comparing Quantities', S7.2 Finding Discounts_
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