4/100 as a percentage is 4.00%. This tiny fraction represents a small part of a whole, and the percent sign makes it easy to compare with other values you might see on a chart or a price tag.
When you see the fraction 4/100, think of it as four out of every hundred pieces. It’s a useful way to talk about things like a 4‑point increase on a test score or a 4‑cent discount on a dollar.
The number is shown with two decimal places (4.00%) to keep the format consistent, especially when it’s listed next to other percentages that may need that level of detail. This rounding keeps everything neat and easy to read.