Percent II

1
Percent II

• by Monica Yuskaitis

2
Definition

• Percent can be defined as of
• one hundred.

of
100
3
20 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
4
Percents Have Equivalents in Decimals and
Fractions
Fraction Simplified
Decimal
Fraction
Percent
20
.20



5
How to Find the Percent of a Whole Number

• The first thing to remember is of means
  multiply in mathematics.

of
x

6
How to Find the Percent of a Whole Number

• Step 1 - When you see a percent problem you know
  when you read of in the problem you multiply.

x
25 of 200
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How to Find the Percent of a Whole Number

• Step 2 Change your percent to a decimal and
  then move it two places to the left.

.
.
25 x 200
8
How to Find the Percent of a Whole 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 a Whole Number

• Step 4 Place the decimal point 2 places to the
  left in your answer.

200
x .
25
1000
400
.
5000
10
What is the percent of this number?
.
20 of 820
.
x
820
x .
20
000
1640
.
16400
11
What is the percent of this number?
.
x
40 of 725
.
2
1
725
x .
40
000
2900
.
29000
12
What is the percent of this number?
.
x
60 of 692
.
1
5
692
x .
60
000
4152
.
21520
13
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