6.1 Percents
Warm­Up
Write each fraction as a decimal.
1.) 3/4 =
2.) 3/8 =
3.) 3/5 =
4.) 6/15 =
1
6.1 Percents
Warm­Up
Write each fraction as a decimal.
1.) 3/4 =
2.) 3/8 =
3.) 3/5 =
4.) 6/15 =
2
Problem of the Day
Alex noted that 4 tulip bulbs bloomed out of every 5
bulbs that he planted. Write the part that bloomed
of the total amount of bulbs planted as a fraction
and a decimal.
Learn to model percents and to write 6.1
percents as equivalent fractions and Percents
decimals. 3
Problem of the Day
Alex noted that 4 tulip bulbs bloomed out of every 5
bulbs that he planted. Write the part that bloomed
of the total amount of bulbs planted as a fraction
and a decimal.
Learn to model percents and to write 6.1
percents as equivalent fractions and Percents
decimals. 4
6.1
Vocabulary
A percent is the ratio of a number to 100. The symbol % is used to indicate that a number is a percent. = 6%
5
Example 1: Modeling Percents
Write the percent modeled by each grid.
A. B.
6
Example 1: Modeling Percents
Write the percent modeled by each grid.
A. B.
7
Check It Out: Example 1
Write the percent modeled by each grid.
A. B.
8
Check It Out: Example 1
Write the percent modeled by each grid.
A. B.
9
Example 2: Writing Percents as Fractions
Write 28% as a fraction in simplest form.
Write the percent as a fraction with a denominator of 100.
Simplify.
10
Check It Out: Example 2
Write 90% as a fraction in simplest form.
11
Check It Out: Example 2
Write 90% as a fraction in simplest form.
12
Example 3: Writing Percents as Decimals
Write 17% as a decimal.
Method 1
Use pencil and paper.
Write the percent as a fraction with a denominator of 100.
Method 2
Use mental math.
Move the decimal point
two places to the left.
13
Example 3: Writing Percents as Decimals
Write 17% as a decimal.
Method 1
Use pencil and paper.
Write the percent as a fraction with a denominator of 100.
Method 2
Use mental math.
Move the decimal point
two places to the left.
14
Check It Out: Example 3
Write 24% as a decimal.
Use paper pencil.
Use mental math.
15
Check It Out: Example 3
Write 24% as a decimal.
Use paper pencil.
Use mental math.
16
Compare >,< or =
18 22%
100
3
5
4
15%
30
60%
17
85%
20
17
Compare >,< or =
18 22%
100
3
5
4
15%
30
60%
17
85%
20
18
19
20
Math Humor
Good math is 50% memorization, 50% hard work, and 50% accuracy.
21
22