In a basket of 20 apples, 5 are rotten. What percentage is rotten ?

Answer

To find the percentage of rotten apples in a basket of 20 apples where 5 are rotten, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the total number of apples and the number of rotten apples.**
- Total apples = 20
- Rotten apples = 5

2. **Set up the formula to calculate the percentage of rotten apples.**
- The formula for percentage is:
\[ \text{Percentage} = \left( \frac{\text{Part}}{\text{Whole}} \right) \times 100 \]
- In this case, the "Part" is the number of rotten apples (5), and the "Whole" is the total number of apples (20).

3. **Substitute the values into the formula.**
\[ \text{Percentage of rotten apples} = \left( \frac{5}{20} \right) \times 100 \]

4. **Calculate the fraction.**
- First, divide 5 by 20:
\[ \frac{5}{20} = 0.25 \]

5. **Multiply the result by 100 to get the percentage.**
\[ 0.25 \times 100 = 25 \]

6. **State the final answer.**
- Therefore, the percentage of rotten apples is **25%**.