# Taxes, discounts, tips and more

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##### Intros
###### Lessons
1. Introduction to taxes, discounts, tips and more
2. Relating Percents to Taxes
3. Relating Percents to Tips
4. Relating Percents to Discounts
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##### Examples
###### Lessons
1. Relating Percents to Taxes

A pack of potato chips is priced at $5. If the sales tax in the province is 15%, how much should the potato chips be sold for? 1. Billy picked a pair of headphones with a selling price of$250 at an electronic store. However, at the check-out counter, he was charged $280. What is the percentage of the sales tax? 1. Relating Percents to Tips A family of three went to a five-star restaurant for dinner. The bill for the meal was$180. The family put down $300 and left without asking for changes. In other words, what is the percentage of tips they have paid? 1. Relating Percents to Discounts A stationary store is having a garage sale. All the binders priced at$12 are now on sale for $9. What is the discount percentage? 1. A suit was originally priced at$880, but it has been marked 25% off. What is the selling price now?
###### Topic Notes

(Original price) + [(Original price) $\times$ (tax/tip in percent)] = (New price)

(Original price) $\times$ [1+ (tax/tip percent in decimal)] = (New price)

(Original price) - [(Original price) $\times$ (discount in percent)] = (New price)

(Original price) $\times$ (1 - discount percent in decimal) = (New price)