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Tuesday, December 6th

Tuesday, December 6th . Please come get new warm ups! Did you write down your homework?. Warm Up. Write each percent or decimal as a percent 1. 6/25 2. .3456. Corny Joke of the Day. What do you call a cow who can’t give milk? An “udder” failure!. Do you Remember?.

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Tuesday, December 6th

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  1. Tuesday, December 6th Please come get new warm ups! Did you write down your homework? Warm Up Write each percent or decimal as a percent 1. 6/25 2. .3456

  2. Corny Joke of the Day What do you call a cow who can’t give milk? An “udder” failure!

  3. Do you Remember? • When you make a decimal a percent you can really move the decimal _______ places to the ___________. • When you make a fraction a percent you want to make an equivalent fraction that has a denominator of _____________________.

  4. Homework Answers

  5. Finding Percents Of a Number

  6. The Meat of it • A percent proportion compares part of a quantity to the whole quantity, this is called the base. • The percent is always written as a fraction with a denominator of 100. “Per” means out of, and “cent” refers to 100. • Ratio Part (is) and whole (of)

  7. Setting it up

  8. Three ways you will see a problem Fill in your table!!!

  9. Caution You will have to solve proportions to work with percents!

  10. Proportion Review Cross Multiply and Divide

  11. Part 1 Finding the percent

  12. What percent of 6 is 3? 100 ÷ 2=50

  13. You Try #1 What percent of 5 is 2?

  14. You Try #2 What percent of 12 is 7?

  15. Part 2 Finding the Part

  16. What number is 50% of 6 6 ÷ 2=3

  17. You Try #1 What number is 25% of 24

  18. You Try #2 What number is 10% of 32

  19. Part 3 Finding the Whole

  20. What number is 3 is 50% of what number? 6 ÷ 1=6

  21. You Try #1 What number is 11 25% of?

  22. You Try #2 What number is 15 30% of

  23. Real Life Application

  24. There are 480 students in Sara’s school. If 70% of the students participate in the fundraising program, how many students participate in the fundraising program?

  25. s 70 33,600 100s ___ ___ _____ ____ 100 100 100 480 Answer Now solve: Let s represent the number of students who participate in the fundraising program. = The cross products are equal. 100 •s = 70 • 480 100s= 33,600 s is multiplied by 100. Divide both sides of the equation by 100 to undo multiplication. = s = 336 Since 336 is close to your estimate of 375, 336 is a reasonable answer. 336 students participate in the fundraising program.

  26. Tanner is 25% of the way through his exercises. If he has exercised for 20 minutes so far, how much longer does he have to work out?

  27. is % 25 20 __ ___ ___ __ m 100 100 of Answer 25% of the exercises are completed, so 20 minutes is 25% of the total time needed. = Set up a proportion. The “of” part is what you have been asked to find. = The cross products are equal. 100 • 20= 25 •m

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