13/100 = 13%
A value of 13% might show up as a sales tax, a discount, or the share of people who choose a certain option in a survey. For example, a store might mark an item as 13% off.
To picture 13%, think of a little more than one out of every ten things. If you imagine 100 items, it means about 13 of them.
A common mix-up is treating 13% as if it were 13 out of 10, rather than 13 out of 100. It’s also easy to confuse a 13% discount with paying only 13% of the original price.