$\frac{5}{9}$  of a number is 50.
What is the number?

A number is increased by  $\frac{1}{5}$  to 36.
What was the original number?

A number is decreased by  $\frac{1}{6}$  to 45.
What was the original number?

A number is increased by  $\frac{2}{3}$  to 50.
What was the original number?

A number is decreased by  $\frac{3}{10}$  to 105.
What was the original number?

A number is increased by  $\frac{2}{5}$  to 49.
Find  $\frac{3}{7}$  of the number.