6-7 - = 20 100 part whole 30 x = 100x 30(20) = 100x 600 100...

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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?
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Unformatted text preview: = 20 100 part whole 30 x = 100x 30(20) = 100x 600 100 100 = x 6 Using a Decimal Change the percent to a decimal. Multiply that decimal by the number you are finding the percent of. Example What is 18% of 70? 18% = 0.18 0.18 x 70 = 12.6 Homework Time...
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This note was uploaded on 11/17/2011 for the course MATH 110 taught by Professor Staff during the Fall '08 term at BYU.

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6-7 - = 20 100 part whole 30 x = 100x 30(20) = 100x 600 100...

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