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Questions???? How much do you pay of the original price if you get 25% off? 75% of the original price “75% of n” means .75 x n For fractions, decimals, and percents, the word “of” means “multiply”; 25% of 20 means… .25 X 20 or ¼ x 20 What happened to the percentage when it was multiplied? The percentage changed to a decimal/ fraction

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**Fractions, Decimals, Percents**

Rational numbers: numbers that can be written in fraction form

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**How do we get from one form to another?**

Percent to decimal 50% = .50 28% = .28 33% = .33 4.6% = .046 What’s happening? Move decimal two places left. Decimal to percent .78 = 78% 3.1 = 310% .057= 5.7% What’s happening? Move decimal two places right? {hint move to the % symbol}

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**How do we get from one form to another?**

Fraction to decimal 2/5 = .4 7/9 = .777… ¼= .25 3/8 = .375 Divide denominator into numerator Decimal to fraction .57= 57/100 .2 = 1/5 Last place value after decimal determines denominator; the decimal number determines the numerator; simplify if possible

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**How do we get from one form to another?**

Percent to fraction 33% = 33/100 48% = 48/100= 12/25 20% = 20/100= 1/5 What’s happening? Percents means out of 100; therefore 100 is the denominator and the percent number is the numerator. Simplify if possible Fraction to percent 2/5 = 40% 1/10 = 10% 3/20 = 15% What’s happening? If possible make an equivalent fraction with a denominator of 100. The numerator will be the percent. Or change to a decimal and turn decimal to percent.

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History Class Aaron received 320 points out of a possible 400 points in his History class. What percent of the possible points did Aaron receive? How many more points did he need to receive an A in History?

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Recycling In the United States, 10 states refund money for the return of bottles? What percent of states do not refund money for recycling of bottles?

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October 1, 2007 Homework Page 383 #s all

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**Percent Grid Activity Roll two dice one at a time Record as a percent**

Shade in the amount of squares on the grid to represent the percent Write percent as a decimal and a fraction

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**Designer Grid Decorate your grid in different colors**

Give the percent, decimal and fraction of the colors you used in your designer grid

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**October 2, 2007 Homework Signed Progress Report**

Copy, study, memorize chart page 386 Page 384 #52 and 56 Page 388 # 56-61 Test Thursday Changing between fractions, decimals, percents

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**Representing Rational Numbers on a Number Line**

Draw a number line in which 0, 1, 1/5, and ¼ are marked. Choose one fraction, one decimal, and one percent that are between 1/5 and ¼. Make sure none of your answers are equivalent to any other. Explain how you know each of your answers are between 1/5 and ¼.

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**Travel State park 0.5 mi Zoo 0.4 mi**

The traffic sign shown tells drivers the distance and direction in which a landmark is located from an exit ramp. What fraction of a mile is each landmark located from the exit? State park mi Zoo mi Camping mi

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Food A chocolate drop weighs 1/6 ounce. Find the decimal equivalent of 1/6 ounce.

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Fortune A woman made a will leaving ½ of her fortune to her sister, 1/3 to her brother, 1/7 to her nephew, and the remainder to her cat. What percent of the woman’s fortune was left to her cat? Round to the nearest whole percent.

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Homework October 3, 2007 STUDY NOTES!!!

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6.1, 6.2, 6.19. a. 5/35 b. 20/32 c. 12/48 a. 6/38 b. 20/100 c. 15/45.

6.1, 6.2, 6.19. a. 5/35 b. 20/32 c. 12/48 a. 6/38 b. 20/100 c. 15/45.

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