Hello!
To convert [tex] \frac{3}{4} [/tex] to a fraction with a denominator of 8, multiply the fraction by [tex] \frac{2}{2} [/tex]; [tex] \frac{2}{2} =1[/tex], so the fraction is equivalent, but would have an increased numerator and denominator.
[tex] \frac{3}{4} * \frac{2}{2} = \frac{6}{8} [/tex]
Your new fraction is [tex] \frac{6}{8} [/tex]. Add it to [tex] \frac{5}{8} [/tex]:
[tex] \frac{6}{8} + \frac{5}{8} = \frac{11}{8} [/tex]
Now we must convert it to a mixed number. To do that, divide 11 by 8.
Answer:
[tex]1 \frac{3}{8} [/tex]