When you report it as a ratio, you write it as a:b. This could also be reported as a fraction as a/b. Ratios and fractions are just the same in concept, which shows the relative amounts of the components. For example, if you want to find the ratio of drums to flutes, that would be 2/4 in fraction form. Since 2 and 4 are multiples of each other, we can simplify it further to 1/2.