Answer
The complement is $65^{\circ}$
Work Step by Step
Two angles are complementary if they add up to $90^{\circ}$.
This means we have to find $\angle A$, where:
$25^{\circ}+\angle A=90^{\circ}$
$\angle A=90^{\circ}-25^{\circ}$
$\angle A=65^{\circ}$