Question 1

How do I calculate a discount percentage?

Accepted Answer

Discount amount = Original price × (Discount percentage / 100). Sale price = Original price - Discount amount. For a $100 item at 20% off: Discount = $100 × 0.20 = $20. Sale price = $100 - $20 = $80.

Question 2

How do stacked discounts work?

Accepted Answer

Stacked discounts apply sequentially, not additively. A 20% discount plus an extra 10% does NOT equal 30% off. First apply 20%: $100 → $80. Then apply 10% to the result: $80 → $72. Total effective discount is 28%, not 30%.

Question 3

How do I calculate the final price with tax?

Accepted Answer

Final price = Sale price × (1 + Tax rate/100). For $80 sale price with 8% tax: $80 × 1.08 = $86.40. Always calculate tax on the discounted price, not the original price.

Question 4

Is a bigger percentage discount always better?

Accepted Answer

Not necessarily. Compare the final dollar savings, not percentages. 50% off $20 saves $10. 20% off $100 saves $20. The lower percentage discount saves more money when the base price is higher.

Question 5

What is a good discount for shopping?

Accepted Answer

Good discounts vary by category: electronics often 10-20%, clothing 30-50% during sales, groceries rarely more than 20%. Seasonal sales like Black Friday offer 30-70% on select items. Compare to regular prices at other stores.

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