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
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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.