Simplify each fraction

5/10

4/12

3/9

5/10 reduces to 1/2 when u divide numerator and denominator by 5

4/12 reduces to 1/3 when u divide numerator and denominator by 4

3/9 reduces to 1/3 when u divide numerator and denominator by 3

Reduce 5/10 to 1/2

Reduce 4/12 to 1/3

And finally reduce 3/9 to 1/3