Percentage, often represented by "%," is a way to say parts per 100. Percentages can be calculated by dividing any fractions that result in a decimal quotient and then multiplying by 100. This can be done by hand or estimated mentally in under a minute in many cases. Use of a calculator is optional.Continue Reading
The end result of calculated percentages lets 100 be the whole. Some part-whole relationships begin with a 100-part whole. For example, if you have a quarter and a nickel, you have 30 cents, or 30 parts of a whole that equals 100. However, many wholes are not made of 100 parts. For example, you might have 11 ounces out of the 16-ounce pound, or you could have worked 20 hours of your 32-hour work week.
Divide the parts present by the number of parts required to make up the whole. These expressions look like fractions. For example, write 30 cents as 30/100 or 11 ounces as 11/16. Take the quotient, usually in the form of a decimal. 30/100 = 0.30 11/16 = 0.6875
Multiply the decimal by 100. The product is the percentage or parts per hundred. 0.30 * 100 = 30% 0.6875 * 100 = 68.75% meaning that if the whole were 100 ounces, you would have almost 69 at the present rate.