36

72

36

72

36÷2

72÷2

18

36

18÷2

36÷2

9

18

9÷3

18÷3

3

6

3÷3

6÷3

1

2

or

36

72

2 × 2 × 3 × 3

2 × 2 × 2 × 3 × 3

1

2

or

Common Divisors for 36 and 72 are: 2, 2, 3 and 3

Greatest Common Divisor = 2 × 2 × 3 × 3 = 36

36÷36

72÷36

1

2

See 1/2 as a percent