An easy to understand and simple way to introduce students to how credit card interest can works and how quickly debt can build up. Simply fill in the two highlighted cells with the credit card rate and how much was spent on the card and the spreadsheet will self populate to show the first 12 months, two years, three years, four years, five years, ten years, 10 years, 20 years and 25 years. A must see for all future credit card owners and a great way to show the real-life application of decimals and percents!