Bell Ringer 03 Discussion on Midterm and Quiz Discussion on Midterm and Quiz You are required to go to at least 2 days of tutoring for test corrections if you have A score of 13 (65%) or below on your Midterm Part 1 and/or A score of 13 (65%) or below on your Midterm Part 1 and/or A score of 6 (67%) or below on your Midterm (Part 2) and/or A score of 6 (67%) or below on your Midterm (Part 2) and/or A score of 38 (69%) or below on your Chapter 2 Quiz A score of 38 (69%) or below on your Chapter 2 Quiz

Project Samples one per group Samples one per group Due Friday or Tuesday Due Friday or Tuesday

Step 1: Find the amount of change Step 2: Find the percent using the amount of change as the numerator and the original number as the denominator Step 3: Set up and solve a proportion to find the percent of increase or decrease. Ex. 1 Original: 25 New: 28 Step 1: 28 – 25 = 3 (increase) Step 2 and 3: change 3 = r original amount ( r) = 3(100) Cross products 25r = 300 Simplify Divide 25 on both sides r = 12 Simplify The percent of increase is 12%. FIND THE PERCENT OF CHANGE

Example 2: Original: 30 New: 12 Step 1: 30 – 12 = 18 (decrease) Step 2 and 3: change 18 = r original amount ( r) = 18(100) Cross Products 30r = 1800 Simplify Divide 30 on each side r = 60 Simplify The percent of decrease is 60%. FIND THE PERCENT OF CHANGE

Sales Paper Activity Choose an item and find the percent of decrease or increase. Choose an item and find the percent of decrease or increase.

p Shared Practice Do 1, 2, 17 and 19 Percent of change can be applied to sales tax and discounts. Sales tax is a tax that is added to the cost of an item. Is sales tax an example of a percent of increase or a percent of decrease? Sales tax is an example of a percent of increase. Discount is the amount by which the regular price of an item is reduced. Is discount an example of a percent of increase or a percent of decrease? Discount is an example of a percent of decrease.

Software costs $ Sales tax is 6.5%. Find the total price of the item. The tax is 6.5% of the cost of the software. Change 6.5% to a decimal (move decimal 2 places left) = % of $39.50 =.065 ($39.50) = $ Round $ to $2.57 (tax). Add this amount (tax) to the original price $ $2.57 = $42.07 The total price is $ FIND THE AMOUNT AFTER SALES TAX

P. 121 #6 dress: $22.50; sales tax 7.5% The tax is 7.5% of the cost of the software. Change 7.5% to a decimal (move decimal 2 places left) = % of $22.50 =.075 ($22.50) = $ Round $ to $1.69 (tax). Add this amount (tax) to the original price $ $1.69 = $24.19 The total price is $24.19.

8. Prom: A limo costs $85 to rent 3 hours plus a 7% sales tax. What is the total cost to rent the limo for 6 hours? 8. Prom: A limo costs $85 to rent 3 hours plus a 7% sales tax. What is the total cost to rent the limo for 6 hours?

HW p even, 24, 26 Bring an ad from the sales paper of an item showing work finding the percent of increase. EXIT SLIP p and 4

p.163 #10. A pair of jeans is on sale for 25% off. The cost of the jeans is $45. Find the discounted price of the jeans. The discount is 25% off the original price. Step 1: 25% of 45 =.25 (45) = $11.25 (amount of discount) Step 2: Subtract $11.25 from the original price. $45 - $11.25 = $33.75 (discounted price) The cost of the jeans after the discount is $ FIND THE AMOUNT AFTER A DISCOUNT

FINDING THE FINAL PRICE # 43. A lamp is $120. It is on sale for 20% off and there is a 6% sales tax on the lamp. Find the final price of the lamp. Step 1: Find the discounted price..20 (120) = $24 Step 2: Subtract the discount amount from the price of lamp $120 – $24 = $96 Step 3: Find the amount of the sales tax..06 (96) = 5.76 (amount of sales tax) Step 4: Find the final price (amount after sales tax is included. $96 + $5.76 = $ The final price of the lamp is $