Respuesta :

     3/5  12/20

+   1/ 4  5/20

__________

             17/20 is the answer
[tex] \frac{3}{5} + \frac{1}{4} \\ \\ \frac{3*4}{5*4}=\frac{12}{20} \\ \\ \frac{1*5}{4*5}= \frac{5}{20} \\ \\ \frac{12}{20} + \frac{5}{20}= \frac{17}{20} \\ \\ Solution: \frac{17}{20}[/tex]