Make Math Work
Percentage
Usage: Percentage [OutOf | Increase | Decrease | Markup | Markdown] New, Original

Percentage is used to calculate the percent when the amounts are known. For example, you can solve the problem: what percent is 140 out of 200? It would be set up: Percentage 140, 200 and would return a result of 70% because 140 / 200 x 100 = 70%.

The percent is found by making a fraction using the...

A percent is simply the number of the percent divided by 100. So, 75% is 75/100.
When using percents, the word "of" means to multiply. So, 75% of 200 means to multiply 75% by 200. It can be rewritten as 75% x 200. Since 75% means 75/100, it can be rewritten again as 75/100 x 200. You can confirm that by contrasting Percent 75, 200 with Calculate 75/100 * 200

amount of increase or decrease / original amount = percent increase or decrease

Increase, Markup, and SalesTax
The percent increase can be found by dividing the amount of the increase by the orignal amount and mulitplying by 100.
Increase / Base x 100 = Percent Increase or (New - Base) / Base x 100 = Percent Increase
To find the percent increase from 80 to 90, find the increase:
90 - 80 = 10
and divide:
10 / 80 x 100 = 12.5

Decrease and Markdown

Enter the percent without a "%" symbol. Percent 75%, 200 is incorrect and will cause an error.

What's the difference between Percent and Percentage?
Percent works with a percent and an amount and calculates an answer as a amount.
Percentage works with amounts and calculates an answer as a percent.
For example, Percent 75,120 returns an amount of 80, because 80 is 75% of 120.
Percentage 80,120 returns 75%, for the same reason that 80 is 75% of 120.

Examples:
Percentage 60 returns...
Percentage 17 returns...