Does 21 over 27 and 35 over 45 a porportion?

To determine if ( \frac{21}{27} ) and ( \frac{35}{45} ) are proportional, we can simplify both fractions. ( \frac{21}{27} ) simplifies to ( \frac{7}{9} ), and ( \frac{35}{45} ) simplifies to ( \frac{7}{9} ) as well. Since both simplified fractions are equal, ( \frac{21}{27} ) and ( \frac{35}{45} ) are indeed proportional.