Basics of percent  a free lesson
Learn the basics of the concept of percent in this easy lesson! Percent (or per cent) means one hundredth. Therefore, 1% means 1/100 or one hundredth, and 7% means 7/100 or seven hundredths. Since percentages are just hundredth parts (which means they are FRACTIONS), we can very easily write them as fractions and as decimals.
The basic 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.


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.


5. Convert the fractions into equivalent fractions with denominator 100,
and write
them as percentages.


6. Write what part of the
rectangle is shaded and what part is unshaded,
both as fractions and
percentages.
a.

b.




7. Write as fractions, decimals, and percentages.


8. Write as percentages, fractions, and decimals.


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.


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)
13. Write as a percentage. Round your answers to the nearest percent.
a. 8/7
b. 1 3/8

This lesson is taken from Maria Miller's book Math Mammoth Percent, and posted at www.HomeschoolMath.net with permission from the author. Copyright © Maria Miller.
Math Mammoth Percent
A selfteaching worktext for 5th7th grade that covers percent, percentage of a number, discounts, sales tax, percent of change, and comparisons with percent.
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Also available as a printed copy.