We know that the two main units for the measurement of capacity are liter and milliliter. In short liter is written as 'l' and milliliter as 'ml'.
As for measuring mass we have made several measures to weigh the
different masses as 1kg, 500g, 250g, 200g, etc. Similarly, for measuring
different capacities there are several different shaped liter-measures
and milliliter measures.
There are different types of shaped vessels having one liter capacity and there are some measures greater than 1 liter capacity are 2 l, 5 l and 10 l.
There are some small measures in ml to measure small quantities of liquid. Some such measures are 500 ml, 200 ml and 100 ml.
In the market and at home we may see some vessels of 10 liters and 15 liters capacity in cylindrical or cuboid shapes. There are different types of drums having 100 liters capacity.
We know that 1 litre = 1000 milliliters (1 l = 1000 ml)
So, 500 ml = 1/2 of a litre
250 ml = 1/4 of a litre
200 ml = 1/5 of a litre
100 ml = 1/10 of a litre
If we have to measure 300 ml of a liquid, we use the measures of 200 ml and 100 ml capacities. To measure 700 ml of a liquid, we use the measures of 500 ml and 200 ml.