2/5 and 1/2
If you multyply 5 and 2 you will get 10 which is a common denominator of both numbers (5 and 2)
Remember that if you do something to your denominator you must also do it to your numerators.
So, 5 multiplied by 2 is 10.... Put both denominators as 10
?/10 and ?/10
Now think... What multiplied by 5 gave me 10? The answer is 2. So, you multiply 2 and 2 in order to give you 4.
Now we have:
4/10 and ?/10
Now you think.... What multiplied by 2 gave me 10? The answer is 5. So you do 1 multiplied by 5 which gives you 5.
Now you have:
4/10 and 5/10
Thats the answer!