8/80 = 10%
A value like 8/80, or 10%, can show up in everyday situations such as a store discount, a test score, or a phone battery warning. For example, a 10% discount means the price is reduced by a small but noticeable amount.
You can picture 10% as one part out of ten equal parts. A quick estimate is to imagine a group of 80 objects divided into ten groups of 8, with one group representing the amount.
A common mistake is thinking 10% means 10 whole units instead of 10 parts out of every 100. The actual amount depends on the total, so 10% of 80 is different from 10% of 800.