Question 25

If 90% of A = 30% of B and B = x % of A, then the value of x is

Solution

Given : 90% of A = 30% of B

=> $$\frac{90}{100} \times A = \frac{30}{100} \times B$$

=> $$9A = 3B$$

=> $$\frac{B}{A} = \frac{9}{3} = 3$$

Also, B = x % of A

=> $$B = \frac{x}{100} \times A$$

=> $$\frac{x}{100} = \frac{B}{A} = 3$$

=> $$x = 100 \times 3 = 300$$

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