CS 3.1-part 2: Proportions with Percents Learning Target: I can use proportional relationships to solve multistep percent problems. Homework: 1) Finish the Socrative Exit Ticket #3 2) Complete p. 12 and correct with Zaption Video CS 3.2 Conversions Warm Up: CS 3.1 packet p. 9 #A, B, C

CS Inv. 3 Packet p. 9 Raspberry: = Cranberry: x = oz. – 9 oz. = 7oz. = x = 44%

C. Identify which estimate seems to the most reasonable: 5% tax on a $42 purchase:Under $2Exactly $2Over $2 9% tax on a $59.99 purchase:Under $6Exactly $6Over $6 = =

D. Find the sales tax for each item. Set up and solve proportions. 1. A sweater for $36 at 7% sales tax ________________ = _________________ 2. A skateboard for $62.80 at 6% sales tax ________________ = _________________ 3. A digital camera for $ at 4.5% sales tax ________________ = _________________ x = $ 2.52 x = $ 3.77 x = $ 11.25

E. The ratio of Bill’s Bikes sells new and used bikes. Bill buys used bikes, fixes them, and marks up the prices by 80%. The salesperson selling the bike gets a 25% commission on the markup. 1. Find the missing values in the table. Costs and Revenue for Linda’s Sales Buying Price Markup (80% of buying price) Selling Price Commission (25% of markup) Profit (money the shop makes on the sale) $48 $252 $14.40 $54 $N Show all of your work: $60 $108 $ – 60 – 12 = $ 36 $ – 140 = $ 112 $ – 29 = $ 83 $72 $90 $ $ 72 $.80N $162 $ $1.8N $18 $.2N $.6N $ 43.20

F. For each arrow in the figure, write a mathematical rule describing how to get from one value to the next value. The first one is done for you. (Use your work from the page before to help you.) x.25 x 2.25 x.75 x 3 ÷ 3

G. For each part, write two equations for the listed relationship. (Use the figure above to help you.) 1. The markup amount and the buying price markup amount = ______ × _________________ buying price = ______ × ___________________ 2. The buying price and the selling price buying price = _________________________________ selling price = _________________________________ 3. The commission and the markup amount ___________________ = _________________________________ ___________________ = _________________________________ 4. The profit and the commission ______________________________________________________.8buying price mark-up1.25 selling x 5/9 buying price x.8 x 2.25 commission x 3 = profit profit ÷ 3 = commission commission.25 x mark-up mark-up commission x 4

Socrative Exit Ticket #3 Finish for Homework along with the Zaption Video 3.2

Did I Meet My Learning Target? I can use proportional relationships to solve multistep percent problems. p. 12 Homework: 1) Finish the Socrative Exit Ticket #3 2) Complete p. 12 and correct with Zaption Video CS 3.2 Conversions