34

68

34

68

34÷2

68÷2

17

34

17÷17

34÷17

1

2

or

34

68

2 × 17

2 × 2 × 17

1

2

or

Common Divisors for 34 and 68 are: 2 and 17

Greatest Common Divisor = 2 × 17 = 34

34÷34

68÷34

1

2

See 1/2 as a percent