Find the ratio of the first quantity to the second.
1 litre, 250 ml

Explanation

To find the ratio of the first quantity (1 liter) to the second quantity (250 ml), follow these steps:

### Step 1: Convert the units to the same measurement
We have 1 liter and 250 ml. First, we need to convert 1 liter into milliliters because the second quantity is already in milliliters.

1 liter = 1000 ml

### Step 2: Write the ratio with the same units
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