20% of A is B, then B% of 20 is same as what?4% of A10% of A20% of ANone of these

1. Break Down the Problem

We start by defining the relationship between A and B based on the given information. We know that:

• $B = 0.2A$ We need to find out what B% of 20 is equal to in relation to A.

2. Relevant Concepts

From the above relation, we need to express "B% of 20" in terms of A. We already have:

• $B = 0.2A$ Thus, B% of 20 can be expressed as: $\text{B\% of 20} = \left(\frac{B}{100}\right) \times 20 = \left(\frac{0.2A}{100}\right) \times 20$

3. Analysis and Detail

Now, we can simplify the expression obtained: $B\% \, \text{of} \, 20 = \left(\frac{0.2A}{100}\right) \times 20 = \left(\frac{0.2 \times 20}{100}\right) A = \left(\frac{4}{100}\right) A = 0.04A$

4. Verify and Summarize

We have derived that:

• B% of 20 is equal to $0.04A$, which is the same as 4% of A.

Final Answer

B% of 20 is the same as 4% of A.