SME
Grade 7 Math · Problem type
Tax, tip, markup, discount or commission?
Use this for “Is it a markup or a discount?” before working out the percent.
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Which percent word fits the situation?
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Assumptions
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Tax, tip and markup are added to a price: the new amount is 100% plus the percent.
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A discount is taken off: the sale price is 100% minus the percent.
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A commission is a percent of the sale that the seller keeps.
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Related lessons
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?”