Today:16

Khan Academy Practice

Vocabulary/Formulas Fraction/

Decimal/Percent Test 4th Period

Warm-Up(5)1. The cost of a weekend movie ticket last year

was $6.00. This year, the same ticket cost 30% more. What is the new cost of the ticket?

......6•1.3 is..2. An $.80 pair of socks is marked up

250%. What is the retail price?3. Write 5.2% as a fraction and as a

decimal number.4. Write one-tenth of ten percent as a fraction, decimal, and percent

• =

**5. Write the percent form of: .4 ÷

Khan Academy:Percentage Word

Problems 1

Vocabulary and

Formulas Section

Of Note book

Compliments: Two numbers are compliments when their

sum is equal to 100%. In other words, the sum of the two parts equals the whole. Every number has its own compliment.Proportion: An equation stating that two ratios are equal.

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Vocabulary:

The compliment of 55% is what?

1421,

23

1716,

98

Determine whether the following are proportions:

Rate: The ratio of two measurements having different units of measure. Example: MPG /Miles per Gallon, Price per pound; $/lb.

Vocabulary:

Ratio: A comparison of two numbers by division expressed in the following ways: , 1 to 2, 1:2 Ratio’s Must use the same Unit of Measurement and are always simplified.

Scale: A rate or a ratio that is used when making a model or a drawing of something that is too large or too small to be drawn at actual size. Example: A map where 1 in. = 10 miles

Write a ratio: 6 inches for every 1.5 feet

With rate problems, one of the units of measurement will always equal 1. Per gallon, per pound, per hour. etc.

What is the rate? 12ounces for $1.80 ~

A percent change is an increase or decrease given as a percent of the original amount. Find the % change: from $2.00 to $5.00

Formulas:

In 2010, a can of Coke cost $.50. The 2014 price is $.85. What is the percent increase for the cost of a Coke?

Test: If you get stuck converting a fraction

into a decimal, you can always,

(and I mean always),start by dividing the numerator by the

denominator. When converting a decimal to a fraction, focus on the number of places to the right of the decimal; it will tell you value of the denominator.

By saying the number without the word ‘over’ or ‘point’, you will have the fraction or decimal you are looking for. All that’s left is to simplify.

A Closer Look at the Numbers....

From Yesterday’s

Battle Royale.Basiente Rangamar

Recap: Nova started and chose 50. From a numbers point of view, why was this the perfect number to start with?After Nova’s 50, the only numbers on Cornelia’s mind to choose from should have been what? Why?

Even this simple exercise involves probability and percentages. The more you know, the better decisions you will make.