61.54% is what you get when you turn the fraction 16⁄26 into a percentage.
The fraction 16⁄26 can be reduced to 8⁄13, but the decimal and percentage forms stay the same. When you think of it as a part of a whole, it means that about 62 out of every 100 pieces are covered.
In everyday terms, if you had 26 items and you took 16 of them, you would have taken roughly three‑fifths of the total. That’s why the percentage looks a little over 60 %. This makes it easy to compare with other numbers that are already in percent form.