3.7 Solve Percent Problems
In this lesson, we will look at different types of
percent problems, determine how to set them up
and solve them using proportions or using a percent
equation.
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What does percent mean?
If you get 87% on a test,
what does this tell you?
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Oct 30­12:18 PM
...turn to page 176
Percent means "divided by 100"
So what does 35% mean?
It means
or 35 out of every 100
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Another way to do it:
write the sentence using math symbols
Typically, the amount of meat you
get from a halibut is 60% of the total
weight of the fish. If you catch a 40 pound halibut,
how much meat will you get back
after it is filleted?
We need to find
60% of 40.
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Notes:
"of " means "times"
"is" means "equals"
to use a percent when solving an equation,
write it as a decimal (move the decimal 2
places to the left)
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Oct 30­12:24 PM
What percent of 14 is 3?
40 is 15% of what number?
What is 120% of 72?
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Concept Summary (see pg 179):
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Oct 23­10:45 AM
The circle graph shows the results of a radio survey in
which 250 listeners were asked to rate a song.
a. How many of the listeners who participated in the
survey were "tired of" the song?
b. How many of the listeners who participated in the
survey "loved" the song?
like:26%
tired: 36%
love:
14%
dont know the song:
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11% dislike:
13%
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