The fraction 86/100 is equal to 86.00% when expressed as a percentage. This means that if you have 86 out of 100 of something, you have 86 percent of the total. It's a pretty high percentage, showing that you have most of a whole unit or group.
In everyday life, you might see this percentage used in various contexts. For example, a student scoring 86/100 on a test would have aced it with an A grade. In weather forecasts, 86% humidity would indicate a very humid day. When talking about battery life, 86% charge means your device still has plenty of power left. This fraction and percentage are useful for describing large portions of a whole in many different situations.