What is the ratio of 500 ml to 2 litre?
Ratio of 500 ml to 2 litre = 500 ml : (2 x 1000 ml) [1 litre = 1000 ml)
Divide each term by 500 ml.
We get,
= 1 : ( 2 x 2)
= 1 : 4
Therefore
Ratio of 500 ml to 2 litre = 1 : 4