The Percentage Calculator

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Percentages are used to express how large and small of one quantity is relative to another quantity. Usually the first quantity represents a part of, or change in the second quantity that is greater than zero.

Although percentages are usually used to express number between zero and on and any dimensionless proportionality can be expressed as a percentage.

Percent means "per hundred", so the quantity should always divided by 100. For example, 75% is 75/100 equals to 0.75; 100% is 100/100 equals to one; 200% is 200/100 equals to two.

The word "Percent" comes from the Latin "Per Centum". The Latin word "Centum" means 100, for example a Century is 100 years.

How to use:
1. To apply the percentage calculation, simply key in both "quantity %" to "another quantity" fields, for example, 60% of 100 then click "Go !" button. Various values will be calculated.

2. Click on "Info !" button to get each of the calculation being explained.

3. To compare the differences between two number, simply key in the both text fields with any positive or negative numbers, for example, 60 to 110. You will see 60 to 110 is about 83.33% increase; 45.45% decrease.

4. Click on "Info !" button to get each of the calculation being explained.