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Math Symbols
The Most Valuable and Important
Miscellaneous Symbols
. . .
Shown and Explained

"Percent"




Background - why percent symbols are used. . .

Symbols are a concise way of giving lengthy instructions related to numbers and logic.

Math Symbols are an invention, not a discovery. They are a communication tool. Symbols are used to eliminate the need to write long, plain language instructions to describe calculations and other processes.




The most valuable, most frequently used Symbols in mathematics . . .

          The most important, most frequently used Symbols for 
            Miscellaneous Symbols are listed below.  

		  
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Math - Symbol for Percent Math Symbol for "Percent" -
To understand the % sign, ask yourself the following four questions: (1) What does the % sign mean? . . . A % is used to compare a number (any number) to 100 using division. Under normal circumstances, all numbers are compared to the number 1 using division.

For example, the number 3 is only a 3 when it is compared to the number 1 using division. It is three times as big as the number 1.

Division However, a % does not use the number 1 for comparison purposes.

A % is used to compare a number (any number) to 100 using division.

Continuing on with the number 3 as an example, the result would be: (Note that the quotient must still equal 3. The number 300 is three times as big as 100.)

Division The final percentage is: 3 = 300% . . . Any number can be converted to a %.

You can complete a short calculation similar to the example shown above, or . . .

. . . Just move the decimal point to the right by two places.

percent - move decimal percent - move decimal percent - move decimal (2) Where is a % math symbol used?

A % math symbol is only used to represent a proportion. A percent tells you that you are dealing with a ratio.

Although any number can be converted into a %, percents are only used to represent ratios.

What is the point of converting a ratio to a %?

Why not just skip the % and use the original number?

Is there any advantage to saying 5.6% instead of .056?

Read on . . .

(3) How is a % math symbol used? There are thousands and thousands of applications where the concept of a percent is used every day.

Here are some common examples:

. . . Sales Tax . . .

. . . If you pay sales tax, the tax will be stated as a %. If the sales tax is 8%, this means that you will pay the government a tax of 8 dollars for every 100 dollars you spend.

. . . Bank Interest . . .

. . . If you deposit money in a bank, the interest the bank will pay on your account will be stated as a %. If the interest rate is 5% (simple annual interest), this means that the bank will pay you 5 dollars for every 100 you leave in your account for one year.

. . . Credit Card Interest . . .

. . . If you use a credit card, the interest you pay on the outstanding balance you owe will be stated as a %. If the interest rate is 20% (simple annual interest), this means that you pay the credit card company an extra 20 dollars per year for every 100 dollars of unpaid debt.

. . . Test Grades in School . . .

. . . Test grades in school are often stated as a %. If a student has a test average of 81%, this means that for every 100 questions the student answers on his or her tests, 81 questions are answered correctly.

. . . Slope of a railroad track . . .

. . . Slope is often stated as a %. If a slope of a railroad track is a 5% grade, this means that for every 100 feet of horizontal distance the tracks drop 5 feet in elevation.

. . . Survey (Poll) . . .

. . . Survey results are often stated as a %. If a survey found that 75% of restaurant patrons preferred a certain type of food, this means that for every 100 people, 75 people prefer that type of food.

(4) What math symbols can be mistaken for a % sign ? . . . Per mille . . .

. . . The Per mille symbol is not equivalent to a Percent symbol.

1 % means 1 part in 100.

1 Per mille Symbol means 1 part in 1000. Per mille Symbol
. . . Basis point . . .

. . . The Basis Point symbol is not equivalent to a Percent symbol.

1 % means 1 part in 100.

1 Basis Point Symbol means 1 part in 10000. Basis Point Symbol





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