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Solve Percent Problems

Solve Percent Problems. You need two different colored highlighters. Not all slides used in notes. Per. cent. Percent Problems. Means to form a ratio written in a fraction format . Means 100 . So 15 percent (15%) means 15/100. A percent is the ratio of a number to 100. 6 100. =. 6%.

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Solve Percent Problems

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  1. Solve Percent Problems You need two different colored highlighters Not all slides used in notes

  2. Per cent Percent Problems Means to form a ratio written in a fraction format Means 100 So 15 percent (15%) means 15/100

  3. A percent is the ratio of a number to 100. 6 100 = 6%

  4. Write the percent modeled by the grids below 25 63 = = 25% 63% 100 100

  5. Sloths may seem lazy, but their extremely slow movement helps to make them almost invisible to predators. Sloths sleep an average of 16.5 hours a day. To find out what percent of a 24-hour day 16.5 hours is, you can use a proportion or an equation. Proportion Method Equation Method n Part Part 16.5 = What percent of 24 is 16.5? Whole 24 Whole 100 n · 24 = 100 · 16.5 n · 24 = 16.5 24n = 1,650 n = 0.6875 n = 68.75 n = 68.75% Sloths spend about 69% of the day sleeping!

  6. EX 1) 15 is 25% of what number? Set up a proportion. 25 100 % 100 Part Whole 15 n = % 100 Is Of = = 25n = 1,500 Multiply. Divide each side by 25 to isolate the variable. 25n 25 = 1,500 25 15 is 25% of 60. n = 60 25% 10% 50% 0 100% 60 15 0 30

  7. EX 2) What percent of 50 is 10? n 100 10 50 = Write a proportion. n · 50 = 100 · 10 Set the cross products equal. 50n = 1,000 Multiply. 50n 50 = 1,000 50 Divide each side by 50 to isolate the variable. n = 20 10 is 20% of 50. 20% 10% 50% 0 100% 50 0 5 10 25

  8. EX 3) What is 40% of 20? 40 100 8 n = Write a proportion. n · 40 = 100 · 8 Set the cross products equal. 40n = 800 Multiply. Divide each side by 40 to isolate the variable. 40n 40 = 800 40 n = 20 8 is 40% of 20. 40% 10% 50% 0 100% 0 2 8 10 20

  9. Notes start here

  10. Date _____________ Solve Percent Problems You need two different colored highlighters Not all slides used in notes

  11. EX 1) 15 is 25% of what number? 25% 10% 50% 0 100% 0

  12. EX 2) What percent of 50 is 10? 10% 50% 0 100% 0

  13. EX 3) What is 40% of 20? 10% 50% 0 100% 0

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