##5/8##

Convert both fractions to have the same denominator.

So, we first find the lowest common multiple for 4 and 8. Which is 8,

##4 xx 2 = 8## and ##8 xx 1 = 8##

So we multiply the numerator and the denominator of the first fraction by 2.

##1/4 xx 2/2 = 2/8##

Now we can simply add them since now they have the same denominator.

##2/8 + 3/8## = ##(2 + 3)/8## = ##5/8##