Lesson 6-7

Printed Notes Lesson 6-7
"Percents and Equations"

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Period __

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Day # _ _

Part 1 "Writing and Solving Percent Equations"

1. Is / Of = % / 100

Part 2 "Using Equations to Solve Percent Problems"

2. See Above, Try This 1-4
    1. What is 45.5% of 20 ?
          X/20 = 45.5/100, 100X = 910, X = 9.1
    2. 380 is 125% of what number ?
          380/X = 125/100, 125X = 38000, X = 304
    3. 5% royalty on $16.99 (penny) ?
          X/16.99 = 5/100, 100X = 84.95.
          X=.8495 → X ≈ 85¢ or .85$
    4. In Survey 922 or 68.6% prefer, how many ?
          X/922 = 68.6/100, 100X = 63249.2,
          X = 632.492 → X ≈ 632

This page was last modified 03/26/08