Ratios can be used to convert units of measurement since you can set up a proportion to convert a measurement to another unit. An example would be converting 14 pints to quarts, which can be solved using your knowledge that 1 quart is equal to 2 pints. If it were to be set up as a proportion, it would look like this: 2/1=14/x
If it were to be represented by a ratio, the ratio of pints to quarts would be represented like this: 2:1, which can be used to help convert 14 pints to quarts.