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,

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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

Fractions, Decimals, Percents
Rational numbers: numbers that can be written in fraction form

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}

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

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.

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?

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?

October 1, 2007 Homework Page 383 #s all

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

Designer Grid Decorate your grid in different colors
Give the percent, decimal and fraction of the colors you used in your designer grid

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

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.

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

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

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.

Homework October 3, 2007 STUDY NOTES!!!

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