Express :
रु.13 as a percentage of रु.39

Answer

To express Rs. 13 as a percentage of Rs. 39, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the values**: We need to find out what percentage Rs. 13 is of Rs. 39. Here, Rs. 13 is the part and Rs. 39 is the whole.

2. **Set up the formula**: The formula to find the percentage is:
\[ \text{Percentage} = \left( \frac{\text{Part}}{\text{Whole}} \right) \times 100 \]
In this case, the part is Rs. 13 and the whole is Rs. 39.

3. **Substitute the values into the formula**:
\[ \text{Percentage} = \left( \frac{13}{39} \right) \times 100 \]

4. **Calculate the fraction**: First, divide 13 by 39:
\[ \frac{13}{39} = \frac{1}{3} \]

5. **Multiply by 100 to convert to percentage**:
\[ \text{Percentage} = \left( \frac{1}{3} \right) \times 100 = \frac{100}{3} \]

6. **Convert to a mixed number**: Now, divide 100 by 3:
\[ 100 \div 3 = 33 \text{ remainder } 1 \]
This means:
\[ \frac{100}{3} = 33 \frac{1}{3} \]

7. **Final answer**: Therefore, Rs. 13 as a percentage of Rs. 39 is:
\[ 33 \frac{1}{3} \% \]