Calculate a discounted price, savings and tax applied after the discount. Enter a reduction percentage: a 20% discount means paying 80% of the original price.
Check the stated input format, calculation convention and limits before using the result.
Check the example inputs, then calculate. Your values stay in this browser.
Tax is assumed to apply to the discounted price.
Discount Calculator validates original price, discount (%), tax on discounted price (%) before applying the displayed equation. Tax is assumed to apply to the discounted price.
Discount Calculator: sale = price × (1−discount/100); final = sale × (1+tax/100). Input definitions: price = Original price; discount = Discount (%); tax = Tax on discounted price (%). Use the selected convention throughout the calculation.
Discount Calculator baseline input: Original price: 100; Discount (%): 20; Tax on discounted price (%): 5. Output: Final price with tax = 84; Savings before tax = 20. Substitute these values into the displayed equation to reproduce the result.
Content and calculation reviewed:
Understand the calculation
A 25% discount on 200 saves 50 and leaves 150. Applying 8% tax to that sale price gives 150×1.08=162. The percentage entered is the reduction, not the amount paid; a Chinese seven-and-a-half discount corresponds to a 25% reduction. Two successive 25% reductions multiply 0.75×0.75, not a single 50% reduction.
sale = price × (1−discount/100); final = sale × (1+tax/100)
The detailed guide adds variable definitions, a reproducible example, a practice question and model limitations.
From question to result