16/54 as a percentage is 29.63%. This value tells you how much of a whole the fraction represents when expressed in percent form.
The fraction 16/54 can be simplified to 8/27, which is still a proper fraction less than one. It shows that for every 27 equal parts, 8 of them are taken.
When you see 29.63%, you know that the part is just under a third of the whole. This is useful for quick comparisons, like seeing that 30% would be a little more than the amount represented by 16/54.
In everyday situations, you might round the percentage to 30% for estimation, but the precise value remains 29.63%.