You are launching your own pop-up shop! Set prices, apply markups, run a sale, add tax, and decide which promo brings in the most value — all with percent math.
You are the owner of a brand-new pop-up shop. You bought items at a cost price and need to mark them up to make a profit. Then you will run a weekend sale (discount!), add sales tax at checkout, and figure out your best promotional offer. Work through four phases, hit Calculate on each, fill in the checklist, and write your storefront sign reflection at the end.
You bought an item at a cost price. Add a markup percent to find what you will charge customers — your selling price.
Step 1: Markup amount = $40.00 × (25 ÷ 100) = $40.00 × 0.25 = $10.00. Step 2: Selling price = $40.00 + $10.00 = $50.00. A 25% markup on $40 gives a $50 selling price.
You are putting your item on sale this weekend! Apply a discount percent to your selling price to find the sale price and how much shoppers save.
Discount amount = $50.00 × (20 ÷ 100) = $50.00 × 0.20 = $10.00. Sale price = $50.00 − $10.00 = $40.00. Shoppers save $10.00!
At checkout, your state adds sales tax to the sale price. Also practice converting a percent to a fraction and a decimal — skills you need every day in business!
Tax: $40.00 × 0.08 = $3.20. Total = $40.00 + $3.20 = $43.20.
Conversions: 35% = 35/100 = 7/20 (simplified) = 0.35. Percent ÷ 100 always gives the decimal form.
Compare two promo ideas and decide which gives customers a better deal (lower final price). Then check a known-answer problem to confirm your percent skills.
Write a short storefront sign (3–5 sentences) explaining your prices to shoppers. Use your real numbers — cost, markup, discount, tax — to justify your pricing decisions.
| Category | 4 — Expert | 3 — Proficient | 2 — Developing |
|---|---|---|---|
| Percent of a Number (Markup) | Markup and selling price both correct; reasoning shown | Selling price correct | Partial work or minor computation error |
| Discounts | Discount amount and sale price both correct | Sale price correct | Attempted; minor arithmetic error |
| Tax & Conversions | Final total correct; fraction and decimal forms both accurate | Final total correct | Tax or conversion has one error |
| Communication | Storefront sign uses all real numbers and justifies every choice | Sign uses most numbers | Sign is unclear or missing key numbers |