Question : If A is equal to 20% of B and B is equal to 25% of C, then what percentage of C is equal to A?
Option 1: 10
Option 2: 15
Option 3: 5
Option 4: 20
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Correct Answer: 5
Solution :
A = 20% of B
⇒ A = $\frac{1}{5}$ × B
⇒ A : B = 1 : 5
Also, B = 25% of C
⇒ B = $\frac{1}{4}$ × C
⇒ B : C = 1 : 4 = 5 : 20
So, A : B : C = 1 : 5 : 20
Let $x$% of C is equal to A.
⇒ $\frac{x}{100} × C = A$
⇒ $\frac{x}{100} × 20 = 1$
⇒ $x$ = 5%
Hence, the correct answer is 5.
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