How do you decide which number to give as the first term of a ratio?

To determine the first term of a ratio, consider the context of what the ratio represents. Generally, the first term corresponds to the quantity that is being compared or is the primary subject of the ratio, while the second term reflects what it's being compared to. It's also important to maintain consistency in the order of terms across similar ratiOS for clarity. Lastly, ensure that the terms are relevant to the relationship you want to convey.