Transcript Fractions, Decimals and Percents

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Objective
Write percents as fractions and
decimals and vice versa
Vocabulary
No Vocabulary
Example 1 Percents as Decimals
Example 2 Percents as Decimals
Example 3 Decimals as Percents
Example 4 Decimals as Percents
Example 5 Fractions as Percents
Example 6 Fractions as Percents
Example 7 Compare Numbers
Write 52% as a decimal.
Write problem
Remove the percent symbol.
%
Divide by 100 by moving decimal 2
places to left
Put new decimal in number
Answer: 0.52
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Write 28% as a decimal.
Answer: 0.28
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Write 245% as a decimal.
Write problem
Remove the percent symbol.
2.45%
Divide by 100
Put new decimal in number
Answer: 2.45
2/7
Write 135% as a decimal.
Answer: 1.35
2/7
Write 0.3 as a percent.
0.30.
Write problem
Multiply by 100 by moving decimal 2
places to the right
30%
Annex a zero in empty space
Place new decimal
Write number with new decimal and
percent sign
Answer: 30%
3/7
Write 0.91 as a percent.
Answer: 91%
3/7
Write 0.71 as a percent.
0.71
Write problem
0.71
Multiply by 100 by moving decimal 2
places to the right
71.%
Place new decimal
Add percent sign
Answer: 71%
4/7
Write 1.65 as a percent.
Answer: 165%
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Write
as a percent.
Write fraction
0.75
Convert to decimal by dividing
numerator by denominator
75 %
Multiply by 100
Add the % sign
Answer: 75%
5/7
Write
as a percent.
Answer: 25%
5/7
Write
as a percent.
Write fraction
Convert to decimal by dividing
numerator by denominator
0.16666 . . .
Multiply by 100
16.666 . . .
Use bar notation for repeating
decimal
Add percent sign %
16.6
16.6%
Answer: 16.6%
6/7
Write
as a percent.
Answer:
6/7
POLITICS In Sun City,
of voters are Democrats. In
Moon Town, 48% of voters are Democrats. In which
town is there a greater proportion of Democrats?
Sun City
45%
Moon Town 48%
Write information
Convert fraction to percent
Compare percents
Answer: Moon Town
Question asks “which town is
there a greater proportion?”
7/7
*
POLITICS In Star City,
of voters are Republicans.
In Meteorville, 13% of voters are Republicans. In
which town is there a greater proportion of
Republicans?
Answer: Star City
7/7
Lesson 5:2
Assignment
Fractions, Decimals and
Percents
17 - 53 All