37/39 as a percentage is 94.87%. This fraction is very close to one whole, so the percentage is also close to 100%. When you see a number like 94.87%, it tells you that 37 out of every 39 parts are present.
The fraction 37/39 can be thought of as taking 37 pieces from a set of 39 equal pieces. Because only two pieces are missing, the result feels almost complete. In everyday terms, this might represent a test score where you missed just a couple of questions out of many.
Knowing the percentage makes it easy to compare the fraction with other numbers. For example, 94.87% is higher than 90% but lower than 95%, so you can quickly see how close it is to a perfect score without doing any extra math.