If you're seeing this message, it means we're having trouble loading external resources on our website.
如果你被网页过滤器挡住,请确保域名*.kastatic.org 和 *.kasandbox.org 没有被阻止.
要登录及使用可汗学院的所有功能,请在您的浏览器中启用 JavaScript.
Rates and percentages are a new and exciting real world application of arithmetic! They come up frequently in everyday life—from figuring out sale prices to calculating tips at restaurants. These are concepts you can actually use every day!
