16

64

16

64

16÷2

64÷2

8

32

8÷2

32÷2

4

16

4÷2

16÷2

2

8

2÷2

8÷2

1

4

or

16

64

2 × 2 × 2 × 2

2 × 2 × 2 × 2 × 2 × 2

1

4

or

Common Divisors for 16 and 64 are: 2, 2, 2 and 2

Greatest Common Divisor = 2 × 2 × 2 × 2 = 16

16÷16

64÷16

1

4

See 1/4 as a percent