Ppm to percent converter

转换Ppm（百万分之几）和百分比（％）

Free application to convert Ppm (parts-per-million) and Percent (%).

You just have to select the type of value you want to convert and fill the field.

In science and engineering, the parts-per-million, 10−6 is a pseudo-units to describe small values of miscellaneous dimensionless quantities

A pie chart showing the percentage by web browser visiting Wikimedia sites (April 2009 to 2012)

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"

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