84

66

84

66

66

66

18

66

18

66

1

18

66

1

18÷2

66÷2

1

9

33

1

9÷3

33÷3

1

3

11

or

84

66

66

66

18

66

18

66

1

18

66

1

18

66

1

2 × 3 × 3

2 × 3 × 11

1

1

3

11

or

Common Divisors for 18 and 66 are: 2 and 3

Greatest Common Divisor = 2 × 3 = 6

1

84÷6

66÷6

1

3

11