78/79 as a percentage is 98.73%. This fraction is just one part short of a whole, so it’s almost a full 100 %. When you look at it as a decimal, it’s 0.9873, which turns into the rounded percentage shown.
The fraction 78/79 can be thought of as 78 pieces out of 79 equal pieces. Because the missing piece is so small, the result feels very close to “complete.” This is why the percentage is so high, sitting just under 99 %.
In everyday terms, saying something is 98.73% means it’s almost entirely there, with only a tiny bit missing. That makes 78/79 a handy way to describe something that’s nearly, but not quite, whole.