Answer
1$\frac{1}{4}$
Work Step by Step
Pastry chef have stick of butter as $\frac{3}{4}$ and $\frac{1}{2}$
total = $\frac{3}{4}$ + $\frac{1}{2}$
=$\frac{3}{4}$ + $\frac{1}{2}\times$ $\frac{2}{2}$
=$\frac{3}{4}$ + $\frac{2}{4}$
=$\frac{5}{4}$
=1$\frac{1}{4}$