5/98 as a percentage is 5.10%. This number is already rounded to the nearest two decimal places, so you can use it directly in everyday calculations.
The fraction 5/98 is a small part of a whole. If you imagine 98 equal pieces, only 5 of those pieces are being counted. That makes it a tiny slice, which is why the percentage looks low.
Seeing the value as 5.10% makes it easier to compare with other percentages you might meet, like sales tax or quiz scores. It tells you that out of every 100 parts, just a little over five are represented by the original fraction.