Express :
18 hour as a per cent of 2 days

Answer

To express 18 hours as a percent of 2 days, we can follow these steps:

### Step-by-Step Solution:

1. **Convert Days to Hours**:
We need to convert 2 days into hours. We know that 1 day has 24 hours.
\[ 2 \text{ days} = 2 \times 24 \text{ hours} = 48 \text{ hours} \]

2. **Use the Percentage Formula**:
The formula to find the percentage is:
\[ \text{Percentage} = \left( \frac{\text{Given Value}}{\text{Total Value}} \right) \times 100 \]
Here, the given value is 18 hours and the total value is 48 hours.

3. **Substitute the Values into the Formula**:
\[ \text{Percentage} = \left( \frac{18}{48} \right) \times 100 \]

4. **Simplify the Fraction**:
We can simplify \( \frac{18}{48} \) by dividing both the numerator and the denominator by their greatest common divisor (GCD), which is 6.
\[ \frac{18 \div 6}{48 \div 6} = \frac{3}{8} \]

5. **Calculate the Percentage**:
Now we substitute back into the percentage formula:
\[ \text{Percentage} = \left( \frac{3}{8} \right) \times 100 \]
To calculate this, we can multiply:
\[ \frac{3 \times 100}{8} = \frac{300}{8} = 37.5 \]

6. **Final Answer**:
Therefore, 18 hours expressed as a percent of 2 days is:
\[ 37.5\% \]