Today we will compute a given percent as a part of a whole number

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

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

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

Percent

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Whole Numbers are counting numbers that start with zero.

Whole Numbers

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Definition“Cent” is a Latin root word which

means 100. Many words have come from the root cent such as: •century•centimeter•centipede •cent

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

95 books

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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.

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.

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.

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

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

Multiply the decimal equivalent of the percent with the whole number.

.754x 0

2

3 0.

What is 50% of a dozen(12)?

50% = ½ = .50Therefore:

(dozen) 12 X .50 = .5012x

01 0

.005+

6 00

6

What is 40% of 20?

40% = 40/100 = .40Therefore:

20 X .40 = .4020x

0 0

.008+

8 00

8

What is 3% of 36?

3% = 3/100 = .03Therefore:

36 X 0.03 = .0336x

8 1

.090+

1 08

1.081

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

What is 4% of 56?

4% = 4/100 = .04Therefore:

56 X 0.04 = .0456x

4 2

.002+

2 24

2.242

What is 12% of 144?

12% = 12/100 = .12Therefore:

144 X .12 = .12144x

84

.

084+

17 28

17.28

0021

What is 8% of 700?

8% = 8/100 = .08Therefore:

700 X .08 = .08700x

00

.

000+

56 00

56

0065

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 writeas 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.