63

45

63

45

45

45

18

45

18

45

1

18

45

1

18÷3

45÷3

1

6

15

1

6÷3

15÷3

1

2

5

or

63

45

45

45

18

45

18

45

1

18

45

1

18

45

1

2 × 3 × 3

3 × 3 × 5

1

2 × ~~3~~ × ~~3~~

1

2

5

or

Common Divisors for 18 and 45 are: 3 and 3

Greatest Common Divisor = 3 × 3 = 9

1

63÷9

45÷9

1

2

5