The degree fo hydrolysis for a salt of strong acid and weak base

Degree of hydrolysis for a salt of strong acid and weak base:

Degree of hydrolysis for a salts of strong acid and weak base is equal to

Degree of hydrolysis (alpha) for a salt of strong acid and weak base is :

The degree of hydrolysis of a salt of weak acid and weak base in it's 0.1 M solution is found to be 50%. If the molarity of the solution is 0.2 M, the percentage hydrolysis of the salt should be