63/80 = 78.75%
A value like 78.75% might show up as a score on a test, a discount on a sale, or the amount of a battery that’s left. It means something is a little less than four-fifths complete.
To picture it quickly, imagine a bar divided into four equal parts and shade in almost three full parts plus a little extra. It’s also close to 80%, so you can estimate it as roughly four-fifths.
One common point of confusion is treating 78.75% as 78.75 whole units instead of 78.75 out of every 100. The percent sign means “per hundred,” which matters when comparing values or finding an amount.