AIM: How can we use proportions to find percents of amounts?
HW: Percents, Tax, Tip, Discounts Word Problem Worksheet
A pair of sneakers cost $85. They are on sale for $15 off. How much do the sneakers cost after the discount?
Answer: $70 ($85-$15)
Please prepare for your Constant of Proportionality quiz on Thursday (12/17/15). Use the resources below to aid in your preparation. Topics for the quiz will include: Unit rate (from a table, graph, and equation), determining if a relationship between two variables is proportional (from a table, rate, or equation), writing equation from tables, and plotting a relationship on a coordinate plane from a table or equation.
Today's Do Now tapped prior knowledge related to discounts being subtracted from original prices. After reviewing answers to the previous night's homework, we discussed the idea of sales as a technique to get consumers to buy more products. Giving the holiday season has begun, students are exposed to prime examples both online and in physical retail stores daily. We investigated two situations: a jacket being sold online that was originally $180 for 40% off and a pair of sneakers originally priced at $124.99 being discounted 20%. Students used percent proportions to determine discounts and subtract them from the original prices to find the sale price. We extended the idea of using proportions to find percents of numbers (as our AIM suggests) to idea of tips at restaurants, and other services. Students saw that unlike in discounts where we subtract the amount, tips are added to the starting amount.
Please use these online resources to supplement your preparation for Thursday's quiz on proportional relationships. Students should review their classnotes, recent vocabulary words, and homework to improve the likeliness of success.
Jeopardy style quiz with answers: http://flipquiz.me/quiz/16707
Applicable Practice Worksheet: http://www.wayne.k12.ny.us/webpages/cferry/files/constant%20of%20proportionality%20hmwk3.pdf
Additional Sheet: http://www.warrencountyschools.org/userfiles/2627/Classes/12715/Constant%20of%20Proportionality%20in%20Various%20Forms.pdf