Problem:
When 125 is subtracted from a number, it reduces to its 37.5 percent. What is 25% of this number?

Given:
- A number reduces to 37.5% when 125 is subtracted from it.

To Find:
- 25% of this number.

Solution:

Step 1: Let's assume the number as 'x'.
- According to the given information, when 125 is subtracted from 'x', it reduces to 37.5%.
- Mathematically, we can express this as:
x - 125 = 37.5% of x

Step 2: Solve the equation to find the value of 'x'.
- To solve the equation, let's convert 37.5% to decimal form by dividing it by 100:
37.5% = 37.5/100 = 0.375
- Substituting the values in the equation:
x - 125 = 0.375x

- Now, let's isolate 'x' by moving all the terms with 'x' to one side of the equation and constants to the other side:
x - 0.375x = 125

- Simplifying the equation:
0.625x = 125

- Divide both sides of the equation by 0.625 to solve for 'x':
x = 125 / 0.625
= 200

Step 3: Find 25% of the number 'x'.
- To find 25% of a number, we multiply the number by 25% or divide it by 4:
25% of x = (25/100) * x
= 0.25 * 200
= 50

Answer:
- 25% of the number is 50.

The number is equal to 62.5
and its 25% is 50