To find out what 30 is of 400, you essentially want to determine the proportion of 30 compared to 400. In mathematical terms, this can be represented as:
1. **Calculating the Percentage**:
- First, divide 30 by 400 to get the decimal value: 30 ÷ 400 = 0.075.
- Next, convert the decimal into a percentage by multiplying by 100: 0.075 × 100 = 7.5%.
So, 30 is 7.5% of 400.
2. **Understanding the Implication**:
This means that if you were to take 30 out of a total of 400, you would be taking approximately 7.5% of that total. Such calculations are often useful in real-life scenarios such as budgeting, statistics, and analyzing data where portions of a whole are involved.