we know that
Dividing is the opposite of multiplying. Therefore, dividing by a fraction can be accomplished by multiplying by its reciprocal
so
\(\frac{\frac{a}{b}}{\frac{c}{d}} =\frac{a}{b}*\frac{d}{c}\)
in this problem we have
\(\frac{a}{b}=\frac{3}{5}\\ \\\frac{c}{d}=\frac{3}{15}\)
substitute in the formula above
\(\frac{\frac{3}{5}}{\frac{3}{15}} =\frac{3}{5}*\frac{15}{3}=3\)
therefore
the answer is
\(3\)
