Solving Problems With Percents

You can see tips on how to teach inequalities, proportional reasoning, ratios, and fractions/decimals/percents. What other middle school math concepts would you like for us to write about?

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00% = x : $5.39 50/100 = x / $5.39 x=$2.70 rounded off to the nearest penny In this example, you have paid $2.70 per box of cereal and you have also saved $2.69 per box of cereal.

Example 2: Calculating Problems Involving Percentages You will be purchasing each of these shirts during the 30% off sale.

Here is an example of how I would sequence the skill over the course of a couple of days.

Typically, I give students three problems that are very similar and ask them, “Are we solving for the part, for the whole, or for the percent?

You may have noticed a pattern in the chart above suggesting how to convert among fractions, decimals and percentages.

The conversion of percentages into fractions is done by simply placing the percentage number over 100.

As shown in the picture below, of all of the persons using a web browser to access Wikipedia, 20.03 %, or 20.03 people out of every hundred people, used Chrome and 19.26% of all of the persons using a web browser to access Wikipedia, 19.26%, or 19.26 people out of every hundred people, used Firefox, etc. Percentages less than 100% are less than 1 or the whole and percentages more than 100% are more than one or the whole; and percentages less than 1% are also possible.

Some examples of percentages less than 100% that are less than 1 and less than the whole are: Percentages have equivalents in terms of a fraction, a decimal point number and as a ratio.

They are proficient at reading a word problem and setting up a proportion.

What I finally got correct this year is the importance of setting up the labels.

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