The ideas in this lesson are taken from Math Mammoth Percent book.
Percent
The concepts and ideas of this lesson are also explained in this video:



1. Write the shaded part and the unshaded part as fractions, as decimals, and as percentages.


2. Write as percentages, fractions, and decimals.


c.f. [available in the book] 
3. Typically seven out of every 100
babies born in the River Creek hospital have a birth
defect, most of them minor defects.
a. What typical percentage of the babies have
birth defects?
b. What typical percentage of the babies do not have
birth defects?
c. About how
many babies with birth defects would you expect to find
in a group of 500
babies?
Other fractions as percents

4. Write what part of the
pencils are short, both as a fraction and as a percentage.
Use equivalent fractions.


[available in the book] 
5. Convert the fractions into equivalent fractions with denominator 100,
and write
them as percentages.


c. [available in the book] 
6. Write what part of the
rectangle is shaded and what part is unshaded,
both as fractions and
percentages.
a.

b.

c. [available in the book] 



7. Write as fractions, decimals, and percentages.


c. [available in the book] 
8. Write as percentages, fractions, and decimals.


c.f.[available in the book] 
9. Write the fractions as percentages.
a. About 4/5 ( _______ %) of the United States population is 14 years old or older.
b. About 2/25 ( _______ %) of the world’s population lives in North America.
c. The continent of Africa covers about 1/5 ( _______ %) of the Earth’s total land mass.
10. Two trees are growing in Sandy’s front yard. The taller
one is 5/4 as tall
as the shorter one.
a. Write the second sentence using a percent instead of a fraction.
b. If the shorter tree is 160 cm tall, how tall is the taller tree?

11. Write the fractions as percentages. Use long division. Round your
answers to the nearest percent.


[available in the book] 
12. Write the fractions as percentages.
Round the answers to
the nearest percent.
a. About 1/20 ( _________ %) of the population of
India is 65 years old or older.
(2009 estimate)
b. About 13/100 (
________ %) of the population of Australia is 65 years old or older
(2009 estimate)
c. [available in the book]
d. [available in the book]
13. Write as a percentage. Round your answers to the nearest percent.
a. 8/7
b. 1 3/8

The ideas in this lesson are taken from Math Mammoth Percent book.
See also these lessons:
Percent of a number using mental math
How to find a percentage of a number using decimals
"What percentage..." / "How many percent...?"
Generate free percent worksheets:
Percent/decimal worksheetsPercent of number (simple)
Percentages/percent word problems