How do you simplify a ratio that contains decimals or fractions?

To simplify a ratio that contains decimals, multiply all parts by 10, 100, 1000 or whatever is needed to turn all the parts into whole numbers.

To simplify a ratio that contains fractions, convert all the fraction so that they have the same denominators. Then the ratio will be the numerators.

E.g. If you have 2/5: 1/5: 3/5, then the ratio will be 2: 1: 3.