1.

If $$\frac{a}{b} = \frac{4}{5}$$and $$\frac{b}{c} = \frac{{15}}{{16}}{\text{,}}$$then $$\frac{{18{c^2} - 7{a^2}}}{{45{c^2} + 20{a^2}}}$$is equal to?

A. $\frac{1}{3}$$
B. $\frac{2}{5}$$
C. $\frac{3}{4}$$
D. $\frac{1}{4}$$
Answer» E.


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