There are 1000 milliliters in 1 liter. This makes the ratio 1000 mL to 1 L.
If there are 500 milliliters of juice in one bottle, you can figure out how many liters are in one bottle of juice.
500 milliliters is

of a liter, since two times 500 is 1000 (equivalent to one liter).
If there are 24 bottles of juice and one half liter in each of them:

x

=

.
24 divided by 2 is twelve.
24 bottles of juice is 12 liters.