Main Idea and New Vocabulary Example 1: Find the Total Cost Example 2: Find the Tip Example 3: Real-World Example Lesson Menu

Solve problems involving sales tax and tips. gratuity Main Idea/Vocabulary

Method 1 Add sales tax to the regular price. Find the Total Cost SOCCER A limited-edition soccer ball costs $30, and the sales tax is 6%. What is the total cost? Method 1 Add sales tax to the regular price. First, find the sales tax. 6% of $30 = 0.06  30 Write 6% as a decimal. = 1.80 The sales tax is $1.80. Next, add the sales tax to the regular price. $30.00 + $1.80 = $31.80 Example 1

Method 2 Add the percent of tax to 100%. Find the Total Cost Method 2 Add the percent of tax to 100%. 100% + 6% = 106% Add the percent of tax to 100%. The total cost is 106% of the regular price. 106% of $30 = 1.06  $30 Write 106% as a decimal. = $31.80 Multiply. Answer: The total cost of the soccer ball is $31.80. Example 1

BOOKS A book cost $22 and the sales tax is 8%. What is the total cost? Example 1 CYP

Method 1 Add the tip to the regular price. First, find the tip. TIPPING Whitney’s bill at a diner came to $26.00. What would she pay if she included a 20% tip? Method 1 Add the tip to the regular price. First, find the tip. 20% of $26.00 = 0.20  26 Write 20% as a decimal. = 5.20 The tip is $5.20. Next, add the tip to the regular price. $26.00 + $5.20 = $31.20 Example 2

Method 2 Add the percent of tip to 100%. Find the Tip Method 2 Add the percent of tip to 100%. 100% + 20% = 120% Add the percent of tip to 100%. The total cost is 120% of the regular price. 120% of $26 = 1.20  $26 Write 120% as a decimal. = $31.20 Multiply. Answer: The total cost of the bill with tip is $31.20. Example 2

TIPPING Dave’s lunch bill came to $11. 00 TIPPING Dave’s lunch bill came to $11.00. What would he pay if he included a 15% tip? A. $11.15 B. $12.65 C. $16.65 D. $25.00 Example 2 CYP

28.25% of $18 = 0.2825  18 Write 28.25% as a decimal. MANICURE A manicure costs $18. The sales tax is 8.25%. You want to tip 20%. Is $22 sufficient to cover the manicure, tax, and tip? Sales tax is 8.25% and the tip is 20%, so together they will be 28.25%. 28.25% of $18 = 0.2825  18 Write 28.25% as a decimal. = 5.09 Multiply. $18 + $5.09 = $23.09 Add. Answer: No, $22 is not sufficient to cover the manicure with tax and tip. Example 3

A. Yes, the massage with tax and tip is $67.10, so $68 is sufficient. MASSAGE A massage costs $55. The sales tax is 7%. You want to tip 15%. Is $68 sufficient to cover the manicure, tax, and tip? A. Yes, the massage with tax and tip is $67.10, so $68 is sufficient. B. No, the massage with tax and tip is more than $68. Example 3 CYP