Percent
The use of percentages is a way of expressing ratios in terms of whole numbers. A ratio or fraction is converted to a percentage by multiplying by 100 and appending a "percentage sign" %. For example, if an investment grows from P=13.00 to A=22.50, then A is 22.50/13.00=1.7308 times as much as P, i.e., 173.08% of P. So it is also true that the investment has grown by 173.08%-100%=73.08%. A change of a certain percent n is sometimes said to be a change of percentage points.
See also
Basis Point, Percentage Error, Percentage Point, PermilExplore with Wolfram|Alpha
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References
Bringhurst, R. The Elements of Typographic Style, 2nd ed. Point Roberts, WA: Hartley and Marks, p. 282, 1997.Referenced on Wolfram|Alpha
PercentCite this as:
Weisstein, Eric W. "Percent." From MathWorld--A Wolfram Resource. https://mathworld.wolfram.com/Percent.html