Goal: The learner will multiply to find a percent of a number. Lesson 8.7
Steps to Success! Write the percent as a fraction and multiply to find the percent. Write percent as a decimal and multiply. Or
Let’s do it! Find 75% of 60. Use a fraction.
The Other Way Find 10% of 74. Use a decimal.
Your turn. Find 50% of 48. Find 10% of 36.
Finding a Discount The regular price of a pair of sneaker is $40. The sale price is 25% off the regular price. What’s the sale price?
Find Sales Tax You are buying dog food that costs $8.50. There’s a 6% sales tax. What is the total amount of your purchase?
Another Way You take a taxi ride. The fare is $23.78. You want to give a 15% tip. Use simpler percents and numbers. Round $23.78 Find 10% of the fare. Find 5% of the fare. Add it up.
Total Bill The bill for breakfast is $28.60. You want to leave a 15% tip. Which equation can be used to find t, the total cost? T= 0.15(28.60) T= 28.60 – 0.15(28.60) T=28.60 + 0.15(28.60) T=28.60 + 15(28.60)
Simple Interest Simple Interest=Principal ●Annual interest rate ● Time in years I = Prt Principal = original amount of money You deposit $75 in an account. The annual interest rate is 4%. How much simple interest will you earn in 2 years?
Assignment P. 437 #3, 7, 11, 15, 19, 20, 24, 28, 30, 32, 34, 36, 52