Fractions, Percents

1
Fractions, Percents Decimals
30
.30
2
Percent
Percent is a ratio that compares a number to 100
The symbol for percent is
Percent means per hundred
So,
is 17
3
40 Means
40 parts out of 100
or
40
hundredths
4
Percents Have Equivalents in Decimals and
Fractions
Percent
Decimal
Fraction
Simplified Fraction
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Find the percent of a Whole Number?

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When you see a percent problem, you know when
you read of in the problem you multiply.
15
100
of
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Change your percent to a decimal and then move
the decimal point two places to the left.
15
x
.
100
.
8
Multiply just like a regular decimal multiplicatio
n problem
100
15
.
x
0
0
5
1
0
0
0

0
0
5
1
9
Place the decimal point 2 places to the left in
your answer.
.
.
10
25 of 300
.
.
300
x
.25
1
0
0
5
6

0
0
0
0
5
0
7
11
Move the decimal point 2 places to the left in
your answer.
.
.
12
25
40
of
Change the percent to a fraction
1.
1


4

13
x
40
40 1
10
x
1
1 x 10
10 1

1 x 1
10
14
75
80
of
1.
Simplify
2.
Multiply
20
x
3


1
4

3 x 20 1 x 1
60


60

1
15
Changing percents to fractions
To express a percent as a fraction, write a
fraction with a denominator of 100

• Remember a percent is a number out of 100.

65 100
65

65 100
5 5
13 20



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Changing fractions to percents
To express a fraction as a percent, write a
fraction with a denominator of 100

• Remember a percent is a number out of 100.

1 4
1 4
x
25
25


x
25
100
25 100
25