Demonstration of cancelling down a fraction to its lowest terms. Single step examples using the 3 and 7 times table. How to cancel fractions with larger numbers in several steps. How to use the prime factors of the numerator and denominator to cancel large fractions.

1. Cancelling down to lowest terms

5. Larger number

9. Work in stages

16. Another example

25. Link with prime factors

26. 612

27. 612 2

28. 612 2 306

29. 612 2 306 2

30. 612 2 306 153 2

31. 612 2 306 153 2 3

32. 612 2 306 153 51 2 3

33. 612 2 306 3 153 51 2 3

34. 612 2 306 3 153 17 51 2 3

35. 612 2 306 3 153 17 51 2 3

36. 1638

37. 1638 2

38. 1638 2 819

39. 1638 2 3 819

40. 1638 2 3 819 273

41. 1638 2 3 3 819 273

42. 1638 2 3 3 819 273 91

43. 1638 2 3 3 819 273 91 7

44. 1638 2 3 3 819 273 91 7 13

45. 1638 2 3 3 819 273 91 7 13

47. 1 1

48. 1 1 1 1

49. 1 1 1 1 1 1