1. Three Types of Percent Problems Day 2

5. 60 = 24.40 Examples: Find 40% of 60 20% of 90.20 90 = 18 Write a mathematical sentence Click

6. X =.10 88 Write a mathematical sentence Try these: Find 12% of 70 What is 40% of 28?

9. is of % 100 = Note: You can use this box to solve many problems involving percents! Note: Try to find the numbers that are attached to the words/symbols: is, of, or percent.

10. Example: What is 25% of 400? Steps 1. Set up the proportion. 2. Substitute. 3. Solve. is of % 100 = What is 25% of 400? 25 100400 ? Click on each box to see if you substituted correctly. 400 x 25 = 100w 10,000 = 100w 10,000/100 = w 100 = w Click

11. Example: What is 32% of 300? Steps 1. Set up the proportion. 2. Substitute. 3. Solve. is of % 100 = 32 100300 ? Click on each box to see if you substituted correctly. 300 x 32 = 100w 9,600 = 100w 9600/100 = w 96 = w What is 32% of 300? Click

12. Try it: What is 20% of 180? Steps 1. Set up the proportion. 2. Substitute. 3. Solve. is of % 100 =

13. 12Find 30% of 45

14. 13What is 15% of 90?

15. 14Find the greater value. A20% of 16 B10% of 90 C25% of 40 D100% of 7

16. 15Find the greater value. A2% of 1000 B5% of 500 C10% of 300 D15% of 100

17. 16Identify any values that are equal. AWhat is 40% of 80? B60% of 70 C25% of 128 D200% of 16

19. X = 50.40 X = 125

20. Try This: 100 is 20% of what number? 100 =.20 x 100 = x.20 x = 500

21. 1756 is 70% of what?

22. 1812% of what number is 6?

23. 1965% of what number is 10?

24. 2027 is 150% of what number?

25. 211% of what number is 12?

27. What percent of 80 is 24? x 80 = 24 X = 24 80 X =.30 X = 30% Remember, you can solve this by: 1. Translating into an equation 2. Setting up a proportion

28. 60 is what percent of 15? 60 = X 15 60 = X 15 4 = X 400% = X

29. 22What percent of 3 is 12?

30. 2330 is what percent of 36?

31. 24What percent of 18 is 180?

32. 252 is what percent of 1?

33. 26What percent of 25 is 20?

34. You have just studied three different types of percent problems. Try all 3 types: 24 is 40% of what number? 42 is what percent of 840? What is 30% of 45?

35. 27Find the largest value. AWhat is 50% of 50? BWhat number is 45% of 60? C30 is 60% of what number? D25% of what number is 150?

36. 28Find the greatest percentage value. AWhat percent of 30 is 18? B60 is what percent of 90? CWhat percent of 70 is 210? D1,000 is what percent of 100?

37. 29Find 20% of 78.

38. 308 is what percent of 28?

39. 31What number is 3% of 17?

40. 32Find 27% of 54.

41. 3323 is what percent of 200?

42. 34What percent is 35 of 20?

43. 3556% of what number is 40?

44. 3645 is 30% of what number?

45. 3762% of 40 is what number? A24.8 B.0155 C24.8% D15.5