Date post: | 02-Jan-2016 |
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With Percent Proportions, Remember…When you are trying to figure out how to set
up your fractions look at the clues in the question.
€
is
of=%
100
Let’s look at an example…What percent of 35 is 15?
Which number is with the of? Which is with the is?
The 35 is with the of, and the 15 is with the is. So this is how we set up our solution…
€
is
of=%
100
15
35=x
100
Now solve it!
€
15
35=x
10015• 100 = 35x
1500 = 35x
42.9% = x
Brandon installed a devices on his dad’s car that guaranteed to increase his gas mileage by 15% He currently gets 22 miles per gallon. How much will the gas mileage increase after installing the device?
Tia received a 6% raise in salary. Before the raise, she was making $52,000 per year. How much more will Tia earn next year?
Remember with Rate…The units on the top and bottom of the
fraction MUST be different:Example:
When you make proportions, the same unite need to line up. Example:€
miles
hour
€
63miles
2hours=
x
17hours
Here’s an example:During Danielle’s trip across the country, she
traveled 2,884 miles in 7 days. How many miles did she travel in the first day?2,884 miles on 7 days is our first rate so we
need to make that a fraction.
Make sure the unite we know lines up correctly and solve.
€
2,884miles
7days
€
2,884miles
7days=
x
1day
Tyler was offered $5,025 per year for a weekend lifeguarding job at a local pool. How much will he make each month?