20/95 as a percentage is 21.05%. This is the rounded value you get when you express the fraction in percent form.
The fraction 20/95 can be reduced to 4/19, which still represents the same part of a whole. Whether you write it as 20/95, 4/19, or 21.05%, the amount stays the same.
Seeing a number like 21.05% is useful when you compare parts of a group. For example, if 20 out of 95 students passed a test, about 21 % of the class succeeded.
In everyday life, percentages make it easy to understand proportions quickly. So whenever you need to describe 20 out of 95 items, you can simply say it’s 21.05% of the total.