40/45 = ≈88.89%
Rounded to 2 decimal places.
A value of 88.89% is close to what you might see on a test score, a survey, or a report showing how many tasks are finished. For example, it could mean that nearly nine out of every ten people liked a new school lunch.
To picture 40/45 quickly, think of a group of 45 items with only 5 missing from the full group. That makes it a little less than nine-tenths, or just under 90%.
One common mistake is to treat 40/45 as exactly 90% because it is so close. It is actually a bit lower, so that small difference can matter when scores or totals need to be precise.