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Quantitative Aptitude›Ch 2: Commercial Maths›Discount Mastery
Master Marked Price, Successive Discounts, and Equivalent Rates
Discount is always calculated on the Marked Price. Selling Price is obtained by subtracting the discount from the Marked Price.
Quick Memory Hooks
| Discounts | Formula / Calc | Net Equivalent |
|---|---|---|
| 10% & 10% | 10 + 10 - 1 | 19% |
| 20% & 10% | 20 + 10 - 2 | 28% |
| 25% & 20% | 25 + 20 - 5 | 40% |
Marked Price
(Printed tag value)
Printed tag value
The shopkeeper prints Rs. 1000 on the item.
Discount
(Percentage reduction)
Percentage reduction
A flat 20% discount is offered.
Selling Price
(Final paid amount)
Final paid amount
Customer pays Rs. 800 after discount.
Successive
(Chained discounts)
Chained discounts
Apply second discount on the reduced price.
Calculating discount on Cost PriceAlways calculate discount on MP
Cost price is for profit/loss, Marked price is always for discount.
Adding 20% and 10% as 30%Use equivalent formula for net 28%
Successive discounts never add up directly; they apply on diminishing values.
Applying discount after adding profitMP is independent base before sale
Keep the relation CP < SP < MP clear in your mind for profit and discount questions.
Q1.Find the single equivalent discount for successive discounts of 20% and 5%.
Q2.An article marked at Rs. 800 is sold for Rs. 680. Find the discount percentage.