From Total Amount Calculate Percentage of A % to Get B% & C%?

How to calculate the percentage for A + B + C from the Total Amount if we have

Eg Basic Salary ?

Housing 25 % of Basic Salary

Transportation 10 % of Basic Salary

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TTOTAL 25,000

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1. Need Detail Formula how to get Basic Salary Amount

2. 25 % of Housing from Basic Salary

3. 10 % of Transportation from Basic SalaryFrom Total Amount Calculate Percentage of A % to Get B% %26amp; C%?
Let Basic salary=a

Housing=25% of Basic salary=(25/100)a=0.25a

Transportation=10% of Basic salary = 0.1a



Basic salary+housing+transportation=25000

i.e a+0.25a+0.1a=25000

1.35a=25000

a=25000/1.35

a=18518.5185





Therefore Basic salary = 18518.5185

Housing = 0.25*18518.5185=4629.62963

Transportation = 0.1*18518.5185=1851.85185