SME
Grade 7 Math
Tax, tip, markup, discount and percent change
The main lesson, then each kind of problem it solves.
Tax, tip, markup, discount and percent change
Main lesson
Discount and sale price
Use this for “A $64 coat is 30% off. What is the sale price?”
Percent increase and decrease
Use this for “The price went from 50¢ to 60¢. What is the percent increase?” or “After a 25% increase it costs $50. What was the original price?”
Percent error
Use this for “A kitchen scale reads 245 g for a 250 g weight. What is the percent error?”
Simple interest
Use this for “$500 at 4% a year for 3 years: how much interest?”
Tax, tip, markup, discount or commission?
Use this for “Is it a markup or a discount?” before working out the percent.