# Use with Lesson 8 MAFS.7.RP.1.3 Course 2, Lesson 2-8 Mathematics Florida Standards – Mathematics, numbering and wording from www.cpalms.org. Find the sale.

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Use with Lesson 8 MAFS.7.RP.1.3 Course 2, Lesson 2-8 Mathematics Florida Standards – Mathematics, numbering and wording from www.cpalms.org. Find the sale price to the nearest cent. 1. \$120 jacket; 30% discount 2. \$10,500 car; 10% discount 3. \$35 sweater; 18% discount; 3% tax 4. An employee at a restaurant receives a 60% discount on meals. If the total before the discount is \$32.50, how much does the employee pay? 5. A shirt is advertised “Buy 1, Get 1 50% off.” If the original price of every shirt is \$12.98 and you take advantage of the special offer, what is the price you would pay per shirt? 6. A hotel room costs \$155 per night. What is the total cost with a 30% discount and 5.5% sales tax?

ANSWERS 1.\$84 2.\$9,450 3.\$29.56 4.\$13 5.\$9.74 per shirt 6.\$114.47 Course 2, Lesson 2-8 Mathematics Florida Standards – Mathematics, numbering and wording from www.cpalms.org. Use with Lesson 8 MAFS.7.RP.1.3

HOW can percent help you understand situations involving money? Course 2, Lesson 2-8

MAFS.7.RP.1.3 Use proportional relationships to solve multistep ratio and percent problems. MAFS.7.EE.2.3 Solve multi-step real-life and mathematical problems posed with positive and negative rational numbers in any form (whole numbers, fractions, and decimals), using tools strategically. Apply properties of operations to calculate with numbers in any form; convert between forms as appropriate; and assess the reasonableness of answers using mental computation and estimation strategies. Mathematical Practices MP1 Make sense of problems and persevere in solving them. MP3 Construct viable arguments and critique the reasoning of others. MP4 Model with mathematics. Course 2, Lesson 2-8 Mathematics Florida Standards – Mathematics, numbering and wording from www.cpalms.org.

How to use the simple interest formula to find interest earned on savings accounts find interest owed on loans and credit cards Course 2, Lesson 2-8

principal simple interest Course 2, Lesson 2-8

WordsSimple interest I is the product of the principle p, the annual interest rate r, and the time t, expressed in years. SymbolsI = prt

HOW can percent help you understand situations involving money? Course 2, Lesson 2-8

Sample answers: Interest rates are written as percents. You can find the amount of simple interest earned on a savings account. You can find the amount of interest charged on bank loans and credit cards. Course 2, Lesson 2-8 HOW can percent help you understand situations involving money?

Would you prefer to deposit \$1,000 at a simple interest rate of 3% for 5 years or \$1,000 at a simple interest rate of 4% for 4 years? Explain your reasoning. Course 2, Lesson 2-8

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