42

63

42

63

42÷3

63÷3

14

21

14÷7

21÷7

2

3

or

42

63

2 × 3 × 7

3 × 3 × 7

2 × ~~3~~ × ~~7~~

2

3

or

Common Divisors for 42 and 63 are: 3 and 7

Greatest Common Divisor = 3 × 7 = 21

42÷21

63÷21

2

3

See 2/3 as a percent