Calculate percentages quickly and easily. Find what percentage one number is of another, calculate percentage increases or decreases, and more.
The percentage sign "%" evolved from the Italian term "per cento" meaning "per hundred." It was originally written as "per 100" before being contracted to "p 100" and eventually to "%".
In business, percentages are used to calculate profit margins, tax rates, interest rates on loans, and discounts. A 20% profit margin means for every $100 in sales, $20 is profit.
Academic performance is often measured in percentages. In many systems, 90-100% represents an A grade, 80-89% a B, 70-79% a C, and so on.
To calculate 10% of a number, simply move the decimal point one place to the left. For 20%, find 10% and double it. For 5%, find 10% and divide by 2.