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Published byVivian Henry Modified over 7 years ago

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Finding a Percent of a Number Lesson 6-7

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Using a Proportion Set up a proportion that uses the percent over 100. Cross multiply to write an equation. Solve the equation. To set up your proportion, think, “IS over OF equals PERCENT over 100.”

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Example – What is 20% of 30? = 20 100 part whole 30 x = 100x 30(20) = 100x 600 100 = x6

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Using a Decimal Change the percent to a decimal. Multiply that decimal by the number you are finding the percent of.

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Example – What is 18% of 70? 18% = 0.18 0.18 x 70 = 12.6

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Homework Time

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