Cách sử dụng
The word "proportional" is used when we want to say that two things change together in the same way. For example, if you drive faster, your time to reach a destination will be shorter. This is because your speed and time are proportional – the faster you go, the less time it takes to get there. Another example might be that the amount of money you have is proportional to the amount of time you work. This means that the more hours you work, the more money you will earn. So, whenever you want to talk about two things that change together, you can use the word "proportional".