A percentage calculator is a tool used to calculate a percentage of a given number. If you have a percentage you wish to convert to a decimal, or have a decimal that you wish to convert to a percentage, this calculator should prove useful. This percentage calculator is useful for students in math classes, such as Algebra and Trigonometry, and also for those who simply want to know the answer to "how much is a certain percentage of something". The percentage calculator also allows you to convert a percentage to a fraction, and also converts a fraction to a percentage. The calculator supports a wide range of conversions, including: percentage to fraction, fraction to percentage, percentage to percentage, percentage to decimal, decimal to percentage, fraction to fraction, and fraction to decimal.