Percentages — Discount, Tax, and Tip
Percentages are the language of commerce. Students calculate discounts, taxes, and tips — and learn to work backward: if a jacket costs $84 after a 30% discount, what was the original price? These percent problems require students to think multiplicatively and reason with proportional relationships.
What students explore
Percentages are the language of commerce. Students calculate discounts, taxes, and tips — and learn to work backward: if a jacket costs $84 after a 30% discount, what was the original price? These percent problems require students to think multiplicatively and reason with proportional relationships.
Key ideas
Calculate a percentage of a whole in real-world contexts. Determine percent increase and percent decrease. Solve problems involving discount, sales tax, and gratuity. Work backward from a final price to find the original value.
Putting it together
Apply these ideas through worked examples, guided practice, and real-world problems.