60

100

60

100

60÷2

100÷2

30

50

30÷2

50÷2

15

25

15÷5

25÷5

3

5

or

60

100

2 × 2 × 3 × 5

2 × 2 × 5 × 5

3

5

or

Common Divisors for 60 and 100 are: 2, 2 and 5

Greatest Common Divisor = 2 × 2 × 5 = 20

60÷20

100÷20

3

5

See 3/5 as a percent