10/78 as a percentage is 12.82%. This tells you how much of a whole 10 parts out of 78 represent when you look at it in terms of 100.
The fraction 10/78 can be thought of as a small slice of a pizza that has been cut into 78 equal pieces. If you took 10 of those pieces, you would have about one‑eighth of the whole pizza, which matches the 12.82% figure.
The number 12.82% is rounded to two decimal places, so the exact value is a little bit higher or lower, but for most everyday uses this rounded form is precise enough.
