A is `20%` of B.
Ratio of `A:B=?`

Options

A. A) 1:5
B. B) 2:3
C. C)3:4
D. D) 4:5

Answer

To find the ratio of A to B given that A is 20% of B, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the relationship**: We know that A is 20% of B. This can be mathematically expressed as:
\[ A = 0.20 \times B \]

2. **Express B in terms of A**: To find the ratio A:B, we can express B in terms of A. Rearranging the equation gives:
\[ B = \frac{A}{0.20} \]

3. **Simplify the expression**: Since 0.20 is the same as \(\frac{1}{5}\), we can rewrite the equation:
\[ B = A \times 5 \]

4. **Set up the ratio**: Now we can express the ratio A:B as follows:
\[ \frac{A}{B} = \frac{A}{5A} = \frac{1}{5} \]

5. **Write the ratio**: Therefore, the ratio of A to B is:
\[ A:B = 1:5 \]

### Final Answer:
The ratio of A to B is \(1:5\).

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