The fraction 90/100 expressed as a percentage is 90.00%. This number tells you how much of a whole 90/100 represents when the whole is taken as 100 %.
A percentage like 90.00% is useful because it lets you compare parts of different totals easily. For example, if a test is out of 100 points and you score 90, you have earned 90 % of the possible points.
In everyday language, saying “90 %” is the same as saying “ninety percent.” It’s a quick way to describe a high level of completeness or success.
Remember that the “.00” part just shows the value rounded to two decimal places, so the number is exact for most practical purposes.