<P> In mathematics, a percentage is a number or ratio expressed as a fraction of 100 . It is often denoted using the percent sign, "%", or the abbreviations "pct .", "pct"; sometimes the abbreviation "pc" is also used . A percentage is a dimensionless number (pure number). </P> <P> For example, 45% (read as "forty - five percent") is equal to ​ ⁄, 45: 100, or 0.45 . Percentages are often used to express a proportionate part of a total . </P>

Is 1 in 10 the same as 10 percent