Solving Percent Problems Using Decimals Worksheet Page 3
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5WORK WITH
the Math
Example 2
Solving a problem using decimal division
Online sales in Canada in 2006 were 139.8% of online sales in 2005.
The value of the sales in 2006 was $49.98 billion. What was the value
of the sales in 2005?
Solution
Write 139.8% as a decimal.
139.8%
1.398
Write the equation relating the sales for
1.398
2005 sales
2006 sales
2005 and 2006.
1.398
2005 sales
$49.98 billion
Divide both sides by 1.398.
Use a calculator to do the division.
2005 sales
$49.98 billion
1.398
$35.75 billion
Sales in 2005 were $35.75 billion.
A
Checking
1.
Write equations involving decimals you could use to solve
each, then solve them.
■
■
a)
15.2% of 35
c)
5.5% of
40
■
■
124% of 18
160% of
30
b)
d)
In November, the number of hits on the school blog rose to
2.
112% of the number in October. There were 500 visitors to
the blog in October. How many hits were there in November?
October: 500 hits on the school blog
November: 112% of the number of October hits
165
Percents
NEL
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