38/56 as a percentage is 67.86%. This number tells you how much of a whole the fraction represents when you look at it in terms of 100 parts.
The fraction 38/56 can be reduced to 19/28, which is a little more than two‑thirds of a whole. Seeing it as 67.86% makes it easy to compare with other percentages, like scores on a test or interest rates.
Whenever you need a quick sense of size, turning a fraction into a percentage helps. So, whenever you see 38 out of 56, think of it as roughly 68% of the total.