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Today we will compute a given percent as a part of a whole number. compute – figure out or an answer using math percent – per one hundred (100) whole number.

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Presentation on theme: "Today we will compute a given percent as a part of a whole number. compute – figure out or an answer using math percent – per one hundred (100) whole number."— Presentation transcript:

1 Today we will compute a given percent as a part of a whole number. compute – figure out or an answer using math percent – per one hundred (100) whole number – counting numbers that start with zero Concept

2 When you take a test your score is shown as a percent. For example, lets say you take a math test that has 100 questions on it. If you score 70%, the number of answers correct is 70. APK

3 Percent means per hundred. It is another way of saying, “out of one hundred.” Percent CD

4 Whole Numbers are counting numbers that start with zero. Whole Numbers CD

5 Definition “Cent” is a Latin root word which means 100. Many words have come from the root cent such as: century centimeter centipede cent CD

6 Books! I have read 95% books out of my 100-book- collection. 95 books CD

7 How to compute a given percent of a whole number. 1. First, find the decimal equivalent of the percent. 2. Multiply the whole number with the decimal equivalent of the percent. 3. Compute the answer.

8 1. Percent is per one hundred, percent may be written as a decimal very easily. Simply place a decimal to the right of the percentage. 2. Next, move the decimal to the left two places. You have now changed your percent into a decimal. 75 %. =.75 Finding the decimal equivalent of the percent.

9 1. Percent is per one hundred, percent may be written as a decimal very easily. Simply place a decimal to the right of the percentage. 2. Next, move the decimal to the left two places. You have now changed your percent into a decimal. 33 %. =.33 Finding the decimal equivalent of the percent.

10 1. Percent is per one hundred, percent may be written as a decimal very easily. Simply place a decimal to the right of the percentage. 2.Next, move the decimal to the left two places. 3.If there is only one digit, you need to write a “0” to the left of the number. You have now changed your percent into a decimal. 3 %. =.030

11 1. Percent is per one hundred, percent may be written as a decimal very easily. Simply place a decimal to the right of the percentage. 2.Next, move the decimal to the left two places. 3.If there is only one digit, you need to write a “0” to the left of the number. You have now changed your percent into a decimal. 9 %. =.090

12 Multiply the decimal equivalent of the percent with the whole number..75 4 x 0 2 3 03 0.

13 What is 50% of a dozen(12)? 50% = ½ =.50 Therefore: (dozen) 12 X.50 =.50 12 x 01 01 0. 005+ 6 00 6

14 What is 40% of 20? 40% = 40/100 =.40 Therefore: 20 X.40 =.40 20 x 0 0. 008+ 8 00 8

15 What is 3% of 36? 3% = 3/100 =.03 Therefore: 36 X 0.03 =.03 36 x 8 1. 090+ 1 08 1.08 1

16 Why is understanding percent of a whole number important? You will know the relationship between any whole number and a percent. You will know how a percent translates into decimals. What are other reasons why it is important to know how to understand IMP

17 What is 4% of 56? 4% = 4/100 =.04 Therefore: 56 X 0.04 =.04 56 x 4 2. 002+ 2 24 2.24 2

18 What is 12% of 144? 12% = 12/100 =.12 Therefore: 144 X.12 =.12 144 x 84. 084 + 17 28 17.28 0021

19 What is 8% of 700? 8% = 8/100 =.08 Therefore: 700 X.08 =.08 700 x 00. 000 + 56 00 56 0065

20 Let’s review what we learned about computing a given percent as a part of a whole number? What does percent mean? How do you write as a decimal? How do you compute a given percent as a part of a whole number? “out of a hundred” 10% 0.10 Multiply the whole number with the decimal equivalent of the percent.


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