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0-6: The Percent Proportion

0-6: The Percent Proportion. 0-6: The Percent Proportion. Percent : A ratio that compares numbers to 100. To write a percent as a fraction: Write the ratio with a denominator of 100 Simplify the fraction, if possible Examples 79% 107% 0.5%. 0-6: The Percent Proportion.

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0-6: The Percent Proportion

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  1. 0-6: The Percent Proportion

  2. 0-6: The Percent Proportion • Percent: A ratio that compares numbers to 100. • To write a percent as a fraction: • Write the ratio with a denominator of 100 • Simplify the fraction, if possible • Examples • 79% • 107% • 0.5%

  3. 0-6: The Percent Proportion • Percent proportion: A ratio of part to a whole equal to a percentage. • part   percentagewhole  • Is/Of = Percent/100 • Example 2 (find the part) • 40% of 30 is what number? • Fill in known information • Cross-multiply • 100a = 1200 Divide by 100 • a = 12

  4. 0-6: The Percent Proportion • Example 3 (find the percentage): Kelsey took a survey of students in her lunch period. 42 out of the 70 students surveyed said their family had a pet. What percent of the students had pets? • Fill in known information • Cross-multiply: 4200 = 70p Divide by 70 • p = 60 • So 60% of the students had pets

  5. 0-6: The Percent Proportion • Example 4 (Find the whole) • 67.5 is 75% of what number? • Fill in known information • Cross-multiply: 6750 = 75b Divide by 75 • 90 = b

  6. 0-6: The Percent Proportion • What is 35% of 250? • 87.5 • 17 is what percent of 68? • 25% • Thirty percent of a number is 39. Find the number. • 130 • Rudy went to see a baseball game. While keeping stats, he counted 44 at bats for the home team. Of these, 11 batters made a hit. What percent of batters got a hit for the home team? • 25%

  7. 0-6: The Percent Proportion • Assignment • Pages P21-P22 • Problems 1 – 31 (odds)

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