Answer:
True.
Step-by-step explanation:
If we were to simplify both fractions down to their simplest form, we would get:
[tex]\frac{3}{9} = \frac{1}{3}[/tex]
[tex]\frac{5}{15} = \frac{1}{3}[/tex]
Therefore, the two ratios do form a proportion. Both are equivalent to [tex]\frac{1}{3}[/tex] when in simplest form.
