Determine if the following pair of fractions is equivalent using cross products.
$\frac{-6}{21}$ & $\frac{2}{7}$

Simplify the following fractions to lowest terms.

$\frac{46x^2{y}^2}{24x^{2}y}$

Simplify the following fractions to lowest terms.

$\frac{100abc}{40bc}$

Simplify the following fractions to lowest terms.

$\frac{224x^3{y}^4{z}^2}{24x{y}^4{z}^2}$

Determine if the following pair of fractions is equivalent by simplifying.

$\frac{3}{5}$ & $\frac{12}{20}$

Determine if the following pair of fractions is equivalent.

$\frac{9}{4}$ & $\frac{27}{12}$

Simplify the following fraction to lowest terms.

$\frac{16}{24}$

Simplify the following fraction to lowest terms.

$-\frac{28}{49}$

Simplify the following fraction to lowest terms.

$\frac{3}{7}$