95/100 = 95%
A value of 95% can show up in everyday life as a test score, a phone battery level, or a weather forecast. It usually means something is very close to complete, though the exact meaning depends on what is being measured.
To picture 95%, imagine a grid of 100 small squares with 95 shaded in. You can also think of it as nearly all of the whole, with just a small gap left.
One common mix-up is treating 95% as the same thing as 95 points. A score of 95% is a proportion of the points available, so it could be 95 out of 100 points or a different number of points on another test.