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Percent Problems

Percent Problems. #22. % 100. is of. =. F.Y.I. . To find the percent one number is of another, use this proportion:.

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Percent Problems

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  1. Percent Problems #22

  2. % 100 is of = F.Y.I. To find the percent one number is of another, use this proportion: Because you are looking for 45%of 420, 45 replaces the percent sign and 420 replaces “of.” The first denominator, 100, always stays the same. The “is” part is what you have been asked to find.

  3. Example 1: Real-World Application There are 560 students in Ella’s school. If 35% of the students participate in after-school sports, how many students participate in after-school sports?

  4. Example 2 There are 480 students in Tisha’s school. If 70% of the students participate in the fundraising program, how many students participate is that ?

  5. Additional Example 2: Application Johan is 25% of the way through his exercises. If he has exercised for 20 minutes so far, how much longer does he have to work out?

  6. Example 3 Katie has read 35% of a book. If she has read 49 pages, how many more pages does Katie have left to read?

  7. Example 4 Justin is 75% through washing and folding his laundry. If he has finished 6 loads, how many loads does he still need to do?

  8. F.Y.I. Instead of using proportions, you can also multiply to find a percent of a number.

  9. Example 5: Multiplying to Find a Percent of a Number Find 36% of 50.

  10. Example 6 Find the percent of each number. 20% of 140

  11. Example 7 Find the percent of each number. 45% of 900

  12. Example 8 Find the percent of each number. 80% of 30

  13. Example 9 Find the percent of each number. 15% of 150

  14. Example 10 Find the percent of each number. 75% of 360

  15. Example 11 Find the percent of each number. 30% of 170

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