Is subtraction associative on rational numbers? State Yes or No.

Find the product $\frac{3}{5}\times \frac{-7}{8}$

Find the product $\frac{-9}{2}\times \frac{5}{4}$

Find the product of $\frac{-6}{11}\times \frac{-5}{3}$.

Find the product $\frac{-2}{3}\times \frac{6}{7}$

Find the following product:

$\frac{-12}{5}\times \frac{10}{-3}$

Find the following product:

$\frac{25}{-9}\times \frac{3}{-10}$

Find the following product:

$\frac{5}{-18}\times \frac{-9}{20}$