A percentage is a number or a ratio expressed as a fraction of 100 and represents a part to whole relationship. The different forms of writing percentages are a decimal number, a fraction, and a ratio. Note that a percent term is used after we write a value (for example: 10 percent).
Complementary Percentages add up to 100%, where 100% refers to the total.
A percentage= 100%- complementary percentages
A percentage formula is
percentage % = 100 * the value to be expressed
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total
(The value to be expressed can be smaller than the total or bigger that the total).
To convert a percentage to a decimal fraction, remove the percent sign % and divide the percentage by 100:
Percentage as a decimal fraction=percentage without the % sign/100
The percentage of the change is equal to the difference divided by the initial value multiplied by 100:
The percentage of the change= (The final value – the initial value ) *100
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The initial value
Percentage data can be given in a table:
- All percentages must sum to 100%.
- Each percentage in the row can represent a value to be expressed. Calculate the value to be expressed of each row by multiplying its percentage as a decimal by the total of the table.
Continue reading this page for detailed explanations and examples.