38.00% is what you get when you turn the fraction 38/100 into a percentage.
The fraction 38/100 already shows a part out of a whole, so the percentage is simply the same number with a percent sign.
When you write it as a percent, you can also show it with two decimal places, which is why it appears as 38.00%.
This format is useful for reports, charts, or any place where percentages are expected.
