Unit 3: Decimals & Percents Practice

Name: _______________________________________

Section 1: What is a Decimal?

1.
Write 4.5 in word form.
2.
Write 12.08 in word form.
3.
Write 0.91 in word form.
4.
Write 150.3 in word form.
5.
Write "Sixty-two and five tenths" as a decimal.
6.
Write "Nine and twenty-three hundredths" as a decimal.
7.
Write "One hundred four and six hundredths" as a decimal.
8.
In 24.75, what is the value of the 7?
9.
In 8.02, what is the value of the 2?
10.
In 13.9, what place is the 9 in?

Section 2: Comparing & Ordering Decimals

Compare using <, >, or =.

1.
0.5 0.50
2.
0.72 0.8
3.
1.25 1.2
4.
6.04 6.4
5.
3.1 3.10

Order from least to greatest.

6.
0.4, 0.45, 0.04
7.
1.7, 1.77, 1.07
8.
2.5, 2.51, 2.15
9.
8.9, 9.8, 8.99
10.
0.1, 0.01, 1.0

Section 3: Adding & Subtracting Decimals

1.
4.5 + 2.3 =
2.
8.75 + 1.25 =
3.
12.8 + 3.45 =
4.
0.9 + 0.88 =
5.
25 + 4.7 =
6.
9.8 - 4.5 =
7.
15.5 - 3.25 =
8.
10 - 4.5 =
9.
7.2 - 1.88 =
10.
You buy an item for $12.75 and pay with a $20 bill. How much change do you get?

Section 4: Introduction to Percent

1.
Write \(\frac{35}{100}\) as a percent.
2.
Write \(\frac{7}{100}\) as a percent.
3.
Write \(\frac{99}{100}\) as a percent.
4.
Write 55% as a fraction.
5.
Write 1% as a fraction.
6.
Write 100% as a fraction.
7.
Out of 100 people, 42 have brown hair. What percent have brown hair?
8.
Your phone battery is at 8%. Write this as a fraction.
9.
A test has 100 questions. You get 88 correct. What is your score as a percent?
10.
Out of 100 cars, 15 are red. What percent are NOT red?

Section 5: The Big Connection

Complete the chart.

FractionDecimalPercent
\(\frac{1}{2}\)
0.25
20%
\(\frac{3}{5}\)
0.07
90%
\(\frac{1}{100}\)
8.
Convert 0.15 to a percent and a simplified fraction.
9.
Which is greater, \(\frac{4}{5}\) or 85%?
10.
A pizza is 75% eaten. What fraction of the pizza is left?