Textbook Page 185 – 186; # 14 – 28 Even & 32 – 37 All.

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Lesson 26 Percent of a Quantity

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Presentation transcript:

Textbook Page 185 – 186; # 14 – 28 Even & 32 – 37 All

Warm Up Write each percent as a fraction. 1) 70% 2) 40% 3) 85% 4) 16% 5) 3%

Section 4 – 3 Proportions & Percent Equations Objectives: To use proportions when solving percent problems To write and solve percent equations

T-Shirts are regularly $20 How much am I saving? What will be the discounted price of each T-Shirt?

You can solve percent problems by writing and solving a proportion!

Example 1 Finding the Part A) Express is selling jeans for 30% off the original price of $50. How much money will I save on each pair of jeans?

B)Best Buy is having a sale. They are taking 25% off of all TVs. If you want to buy a 55’’ LED TV that costs $1,500, how much will you save?

C) Find 75% of 320. D) 30% of 70 is what number?

Example 2 Finding the Percent A)Passaic Valley High School students have a 6 ½ hour school day. What percentage of the day do they spend in school?

B) What percent of 80 is 18? C) 18 is what percent of 90?

Example 3 Finding the Whole A)You buy a pair of shoes and on your receipt it says you saved $15. If they were marked down 30%, how much did the shoes cost originally?

B) 15% of what number is 24? C) 20 is 40% of what number?

Summary

Ticket Out 1) What is 35% of 160 2) What percent of 450 is 36? 3) 32 is 80% of what number?

Homework Practice 4 – 3 Ditto; #1 – 23.