Answer :

[tex] \frac{3}{4} ~ + ~ \frac{18}{19} [/tex]

Convert the denominators into a same number..

[tex] \frac{57}{76}~+~ \frac{72}{76} [/tex]

[tex] \frac{57~+~72}{76} [/tex]

[tex] \frac{129}{76} [/tex]

[tex]1 \frac{53}{76} [/tex]