45

75

45

75

45÷3

75÷3

15

25

15÷5

25÷5

3

5

or

45

75

3 × 3 × 5

3 × 5 × 5

3

5

or

Common Divisors for 45 and 75 are: 3 and 5

Greatest Common Divisor = 3 × 5 = 15

45÷15

75÷15

3

5

See 3/5 as a percent