If A's salary is 25% higher than B's salary, then how many percent is B's salary lower than A's?

If A's salary is 25% higher than B's salary, then how many percent is B's salary lower than A's?

Explanation
Let's denote B's salary as 100.
Given that A's salary is 25% more than B's:
A's salary = 100 + 25% of 100
= 100 + 25
= 125
To find the percentage by which B's salary is lower than A's:
Difference = A's salary - B's salary = 125 - 100 = 25
Percentage lower = (Difference / A's salary) * 100
= (25 / 125) * 100
= 20%