54

81

54

81

54÷3

81÷3

18

27

18÷3

27÷3

6

9

6÷3

9÷3

2

3

or

54

81

2 × 3 × 3 × 3

3 × 3 × 3 × 3

2 × ~~3~~ × ~~3~~ × ~~3~~

2

3

or

Common Divisors for 54 and 81 are: 3, 3 and 3

Greatest Common Divisor = 3 × 3 × 3 = 27

54÷27

81÷27

2

3

See 2/3 as a percent