Two fractions have a sum of 1. If one of the fractions is $\frac{a}{b}$, what is the other?
Choose the correct answer below.
A$\frac{b}{a}$
B$\frac{a - b}{b}$
C$\frac{b - a}{a}$
D$\frac{b - a}{b}$
Choose the correct answer below.
A$\frac{b}{a}$
B$\frac{a - b}{b}$
C$\frac{b - a}{a}$
D$\frac{b - a}{b}$