Percentage Equations Section 3-3-3. In an equation write = for “is” multiply for “of.” Keep the numbers the same. Write the percent as a decimal. Put.

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Presentation transcript:

Percentage Equations Section 3-3-3

In an equation write = for “is” multiply for “of.” Keep the numbers the same. Write the percent as a decimal. Put an x for the “what”

Percent Percent is per hundred. Imagine 15 red marbles in a pile of 40 marbles. If the ratio is the same, how many red marbles would there be in a pile of 100 marbles?

Percent A percentage is a portion of the whole amount. Think of a 50% off sale on a $24 shirt. To figure this divide by 2 or multiply by.5.

Changing Percent to Decimal Review topic 2 showed that to change a percentage to a decimal, divide by 100. This is easily done by moving the decimal to the left two places. 50% is.5. 50% of $24 can be written.5(24). The result is 12. Of means times in math.

Practice Solving Equations Review solving one step equations by rewriting a percent question sentence as an equation.