What is the best way to work out a percentage of a number?
Percentages are used to compare a number to a whole. To calculate the percentage of a number, divide it by the whole and then multiply by 100. For example, if you have 10 out of 20, 10 divided by 20 is 0.5, then 0.5 × 100 is 50%
Finding the Percentage of Numbers
Percentage - a way to describe a part of a whole number using the symbol %. Rate - a way to compare two different kinds of numbers. Fraction - a way to show a part of a whole number by using two numbers separated by a slash (/) symbol.
Percentages were first used in ancient Babylonian and Egyptian mathematics, about 3,000 years ago. The symbol for percent (%) is derived from the Latin word per centum, meaning 'for every hundred'. The number 100 is the only three-digit number that is a perfect square and a perfect cube, which means it's the only number that is equal to its own square root and its own cube root.
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