I will mark branliest for ever Andrews first and it’s also 40 points

1. Which number would divide the numerator and the denominator of the first fraction to yield the second fraction?

5/10 divide ?/?= 1/2

2. 12/15 divide ?/? = 4/5

3. 10/12divide ?/? = 5/6

4. 14/18 divide ?/? = 7/9