Question 676893
To begin lets make these both fractions
15 * 4 + 4 = 64 = {{{64/15}}} and {{{3/4}}}
next we want to get a common denominator 
we will do 60
{{{(64/15)}}} will be {{{(256/60)}}} because 15 * 4 = 60 you have to multiply 64 by 4 also
also {{{(3/4)}}} will be {{{(45/60)}}} because 4*15 = 60 and 3* 15 = 45
now you want to add the numerators
256 + 45 = 301 so the answer is {{{(301/60)}}} this cannot be simplified so this is the answer.