Note: Stacked discounts apply sequentially to each resulting subtotal, not simply added together.
| Offer | Rule | Savings | Final Price | Effective % |
|---|
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Pricing advice: Compare the final checkout price, not only the advertised discount percentage. Actual tax, coupon stackability, and shipping terms depend on retailer policy.
| Discount % | Total Saved | Final Sale Price | Effective Rate |
|---|
Understanding the mathematics of discounts ensures you accurately evaluate promotions, verify retail claims, calculate sales tax impact, and determine exact cash savings.
Percentage markdowns reduce the original price proportionally. A 20% discount on a ₹1,000 item saves ₹200, resulting in a ₹800 final price.
When multiple discounts apply successively (e.g., 30% sale + 10% coupon), the second discount applies to the already discounted price, yielding an effective 37% discount, not 40%.
In standard commercial pricing, sales tax or GST is calculated on the net discounted subtotal, ensuring you only pay tax on what you actually spend.
Shows the step-by-step price reduction across sequential discount tiers:
\text{Discount} = \text{Original Price} \times \left(\frac{\text{Discount \%}}{100}\right)
\text{Final Price} = \text{Original Price} - \text{Discount Amount}
\text{Original Price} = \frac{\text{Sale Price}}{1 - (\text{Discount \%} / 100)}
\text{Final Price} = \text{Original} \times \prod_{i=1}^{n} \left(1 - \frac{d_i}{100}\right)