10/12 as a percentage is 83.33%. This value tells you how much of a whole the fraction represents when you look at it in terms of hundredths.
The fraction 10/12 can be simplified to 5/6, which is a common way to write it in lowest terms. Both the original fraction and the simplified one describe the same part of a whole, just with different numbers.
When you see 83.33% on a chart or in a report, you know it comes from the same 10/12 ratio. It’s a quick way to compare sizes without dealing with fractions.