48

80

48

80

48÷2

80÷2

24

40

24÷2

40÷2

12

20

12÷2

20÷2

6

10

6÷2

10÷2

3

5

or

48

80

2 × 2 × 2 × 2 × 3

2 × 2 × 2 × 2 × 5

3

5

or

Common Divisors for 48 and 80 are: 2, 2, 2 and 2

Greatest Common Divisor = 2 × 2 × 2 × 2 = 16

48÷16

80÷16

3

5

See 3/5 as a percent