36

63

36

63

36÷3

63÷3

12

21

12÷3

21÷3

4

7

or

36

63

2 × 2 × 3 × 3

3 × 3 × 7

2 × 2 × ~~3~~ × ~~3~~

4

7

or

Common Divisors for 36 and 63 are: 3 and 3

Greatest Common Divisor = 3 × 3 = 9

36÷9

63÷9

4

7

See 4/7 as a percent