Fiveable

💯Math for Non-Math Majors Unit 6 Review

QR code for Math for Non-Math Majors practice questions

6.2 Discounts, Markups, and Sales Tax

6.2 Discounts, Markups, and Sales Tax

Written by the Fiveable Content Team • Last updated August 2025
Written by the Fiveable Content Team • Last updated August 2025
💯Math for Non-Math Majors
Unit & Topic Study Guides

Discounts, markups, and sales tax are key concepts in retail pricing. These tools help businesses set competitive prices while maintaining profitability. Understanding how they work is crucial for both consumers and retailers in making informed financial decisions.

Calculating discounts, markups, and sales tax involves simple mathematical operations. By mastering these calculations, you can easily determine sale prices, retail prices, and total costs. This knowledge empowers you to compare prices effectively and budget more accurately.

Discounts, Markups, and Sales Tax

Discounts and sale price calculations

  • Discount represents a reduction in the original price of an item
    • Discount amount can be expressed as a dollar value ($$10 off) or percentage (20% off)
    • Discount percentage is calculated by dividing the discount amount by the original price and multiplying by 100: Discount AmountOriginal Price×100\frac{\text{Discount Amount}}{\text{Original Price}} \times 100
      • Example: If an item originally priced at 50isdiscountedby50 is discounted by 10, the discount percentage is \frac{10}{50} \times 100 = 20\%
    • To find the discount amount, multiply the original price by the discount percentage expressed as a decimal
      • Example: If an item is priced at 80witha1580 with a 15% discount, the discount amount is 80 \times 0.15 = 1212
  • Sale price is the price after the discount has been applied
    • Calculate the sale price by subtracting the discount amount from the original price: Original PriceDiscount Amount\text{Original Price} - \text{Discount Amount}
      • Example: If an item originally priced at 60hasadiscountof60 has a discount of 12, the sale price is 6060 - 12 = 4848
    • Alternatively, multiply the original price by (1 - discount percentage expressed as a decimal)
      • Example: If an item is priced at 75witha2075 with a 20% discount, the sale price is 75 \times (1 - 0.20) = 6060
Discounts and sale price calculations, 11.9 Discounts – Introduction to Marketing II 2e (MKTG 2005)

Markup percentages for retail pricing

  • Markup is the difference between the wholesale cost and the retail price of an item
    • Markup amount can be expressed as a dollar value ($$15 markup) or percentage (30% markup)
    • Markup percentage is calculated by dividing the markup amount by the wholesale cost and multiplying by 100: Markup AmountWholesale Cost×100\frac{\text{Markup Amount}}{\text{Wholesale Cost}} \times 100
      • Example: If an item has a wholesale cost of 40andamarkupof40 and a markup of 20, the markup percentage is \frac{20}{40} \times 100 = 50\%
    • To find the markup amount, multiply the wholesale cost by the markup percentage expressed as a decimal
      • Example: If an item has a wholesale cost of 25withamarkuppercentageof6025 with a markup percentage of 60%, the markup amount is 25 \times 0.60 = 1515
  • Retail price is the price at which an item is sold to consumers
    • Calculate the retail price by adding the markup amount to the wholesale cost: Wholesale Cost+Markup Amount\text{Wholesale Cost} + \text{Markup Amount}
      • Example: If an item has a wholesale cost of 50andamarkupamountof50 and a markup amount of 30, the retail price is 50+50 + 30 = 8080
    • Alternatively, multiply the wholesale cost by (1 + markup percentage expressed as a decimal)
      • Example: If an item has a wholesale cost of 60withamarkuppercentageof4060 with a markup percentage of 40%, the retail price is 60 \times (1 + 0.40) = 8484
  • Profit margin is closely related to markup and represents the percentage of profit relative to the selling price
Discounts and sale price calculations, Marketing Mix Introduction | Introduction to Business

Total costs with sales tax

  • Sales tax is a percentage of the purchase price added to the total cost of an item
    • Sales tax rates vary by state, county, and city (New York City 8.875%, Los Angeles County 9.5%)
    • Sales tax amount is calculated by multiplying the purchase price by the sales tax rate expressed as a decimal
      • Example: If an item is purchased for 100inalocationwitha7100 in a location with a 7% sales tax rate, the sales tax amount is 100 \times 0.07 = 77
  • Total cost is the final price paid for an item, including the purchase price and sales tax
    • Calculate the total cost by adding the sales tax amount to the purchase price: Purchase Price+Sales Tax Amount\text{Purchase Price} + \text{Sales Tax Amount}
      • Example: If an item is purchased for 80withasalestaxamountof80 with a sales tax amount of 6.40, the total cost is 80+80 + 6.40 = 86.4086.40
    • Alternatively, multiply the purchase price by (1 + sales tax rate expressed as a decimal)
      • Example: If an item is purchased for 120inalocationwitha6.5120 in a location with a 6.5% sales tax rate, the total cost is 120 \times (1 + 0.065) = 127.80127.80
  • When making purchases in different localities, it is essential to consider the specific sales tax rates for each location to accurately calculate the total cost of items
    • Example: Purchasing a 50iteminCityAwitha550 item in City A with a 5% sales tax rate would result in a total cost of 52.50, while the same item purchased in City B with an 8% sales tax rate would cost $$54
  • Some countries use a value-added tax (VAT) system instead of sales tax, which is applied at each stage of production

Market Factors Affecting Pricing

  • Supply and demand play a crucial role in determining market prices for goods and services
  • Price elasticity measures how sensitive demand is to changes in price
  • The Consumer Price Index (CPI) is used to track changes in the cost of goods and services over time, affecting pricing strategies