1. Percent IIPercent II

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DefinitionDefinition
 Percent can be defined as “of
one hundred.”
100
of

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20 % Means20 % Means
20 parts out of 100 or 20 hundredths.
1 2 3 4 5 6 7 8 9 10
11 12 13 14 15 16 17 18 19 20
21 22 23 24 25 26 27 28 29 30
31 32 33 34 35 36 37 38 39 40
41 42 43 44 45 46 47 48 49 50
51 52 53 54 55 56 57 58 59 60
61 62 63 64 65 66 67 68 69 70
71 72 73 74 75 76 77 78 79 80
81 82 83 84 85 86 87 88 89 90
91 92 93 94 95 96 97 98 99 100

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Percents Have Equivalents inPercents Have Equivalents in
Decimals and FractionsDecimals and Fractions
20% .20
20
100
1
5= = =
Decimal Fraction
Fraction
SimplifiedPercent

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How to Find the Percent ofHow to Find the Percent of
a Whole Numbera Whole Number
 The first thing to remember is “of”
means multiply in mathematics.
of = x

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How to Find the Percent ofHow to Find the Percent of
a Whole Numbera Whole Number
 Step 1 - When you see a percent
problem you know when you read
“of” in the problem you multiply.
25% of 200x

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How to Find the Percent of aHow to Find the Percent of a
Whole NumberWhole Number
 Step 2 – Change your percent to a
decimal and then move it two places
to the left.
25% x 200..

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How to Find the Percent of aHow to Find the Percent of a
Whole NumberWhole Number
 Step 3 – Multiply just like a regular
decimal multiplication problem.
200
x .25
1000
+400
5000

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How to Find the Percent of aHow to Find the Percent of a
Whole NumberWhole Number
 Step 4 – Place the decimal point 2
places to the left in your answer.
200
x .25
1000
+400
5000.

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What is the percent of this number?What is the percent of this number?
820
x .20
000
+1640
16400.
20 % of 820.. x

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What is the percent of this number?What is the percent of this number?
725
x .40
000
+2900
29000.
40 % of 725.. x21

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What is the percent of this number?What is the percent of this number?
692
x .60
000
+4152
21520.
60 % of 692.. x15

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CreditsCredits
Powerpoint Presentation from
Monica Yuskaitis located on the
Internet at
www.ceres.k12.ca.us/iweb/lesso
ns/Monica%27s
%20Math/Percent%20II.ppt