What should be added to -3/4 to get 1?
Let the number to be added = $x$
So, $-\frac{3}{4} + x = 1$
Add $\frac{3}{4}$ to both sides:
$x = 1 + \frac{3}{4} = \frac{4}{4} + \frac{3}{4} = \frac{7}{4}$
Final answer: $x= {\frac{7}{4}}$