Percent
Use for the noun 'percentage'. For example, 'a high percentage' is 'un porcentaje alto'.
The symbol itself. When you see '%', you read it aloud as 'por ciento'.
A slightly more formal or technical way to say 'percent', often used in finance or statistics.
The store offers a twenty percent discount.
50% (Fifty percent) of the employees work from home.
What percentage of your day do you spend in the car?
Only ten percent of the desserts don't have sugar.
The terms 'por ciento' and 'porcentaje' are standard and universally understood across all Spanish-speaking countries, including Spain, Mexico, Colombia, and Argentina. There are no significant regional variations for this mathematical term.
Confusing 'por ciento' and 'porcentaje'. Don't say 'veinte porcentaje'. 'Por ciento' follows a number (veinte por ciento). 'Porcentaje' is the general noun for 'percentage' (un porcentaje alto).
Using 'por' instead of 'de' after the percentage. It's 'el diez por ciento DE la población', not 'el diez por ciento por la población'. 'De' means 'of' in this context.
Forgetting the article with 'porcentaje'. Don't say 'necesito saber porcentaje'. Say 'necesito saber EL porcentaje'. It's a masculine noun that usually requires an article.
Writing the percent sign correctly. In Spanish, there is sometimes a space between the number and the % sign (e.g., 25 %). While not always followed in casual writing, it is the formal rule.