Percentage number of insect species out of the total known organisms is

Options

A. 75
B. 61
C. 53
D. 47

Answer

To solve the question regarding the percentage of insect species out of the total known organisms, follow these steps:

### Step-by-Step Solution:

1. **Identify the Total Number of Known Organisms**:
- According to the information provided, the total approximate number of known organisms (including both plants and animals) is 1.7 million.

2. **Determine the Percentage of Insect Species**:
- It is stated that approximately 61% of the total known species are insects.

3. **Calculate the Number of Insect Species**:
- To find the number of insect species, you can use the percentage:
\[ \text{Number of Insect Species} = \text{Total Known Organisms} \times \left(\frac{\text{Percentage of Insects}}{100}\right) \]
\[ \text{Number of Insect Species} = 1.7 \text{ million} \times \left(\frac{61}{100}\right) = 1.037 \text{ million} \]

4. **Conclude the Percentage**:
- The question asks for the percentage of insect species out of the total known organisms, which is already given as 61%.

5. **Final Answer**:
- Therefore, the percentage number of insect species out of the total known organisms is **61%**.