28/320 = 8.75%
A value like 28 out of 320 might show up in a school survey, where 28 students choose a certain option out of 320 responses. It could also describe 28 defective products in a shipment of 320 items, which is 8.75%.
To picture it quickly, imagine 320 small squares with 28 shaded in; the shaded part would be a little less than one-tenth of the whole. You can estimate it as roughly 9%, or about 1 out of every 11 people or items.
A common mistake is thinking 8.75% means nearly 80% because of the digits 8 and 75. The percent sign means the amount is measured out of 100, so this value represents a fairly small portion.