Write the ratio of 200 mL to 2.5L in simplest form.

Answer

To find the ratio of 200 mL to 2.5 L in its simplest form, we can follow these steps:

### Step-by-Step Solution:

1. **Convert liters to milliliters**:
- Since 1 liter is equal to 1000 milliliters, we need to convert 2.5 liters to milliliters.
- Calculation:
\[ 2.5 \, \text{L} = 2.5 \times 1000 \, \text{mL} = 2500 \, \text{mL} \]

2. **Write the ratio**:
- Now we can express the ratio of 200 mL to 2500 mL.
- This can be written as:
\[ \text{Ratio} = \frac{200 \, \text{mL}}{2500 \, \text{mL}} \]

3. **Simplify the fraction**:
- We can simplify the fraction by dividing both the numerator and the denominator by 100.
- Calculation:
\[ \frac{200 \div 100}{2500 \div 100} = \frac{2}{25} \]

4. **Final Ratio**:
- The simplest form of the ratio of 200 mL to 2.5 L is:
\[ \frac{2}{25} \]

### Final Answer:
The ratio of 200 mL to 2.5 L in simplest form is \( \frac{2}{25} \).