It is not possible to answer the question because it does not specify what to convert to.
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I is ot possible. You need TWO measures to convert to parts per million.
ppm means parts per million; percent basically means parts per hundred. Therefore, to convert from ppm to percent you should divide by 10,000.
parts per million = ppm
Parts per million is a fraction with denominator 1,000,000. For example 5 parts per million means 5/1,000,000. Percent is a fraction with denominator 100. For example, 5 percent is 5/100. So your goal is to convert a fraction with denominator 1,000,000 into a fraction with denominator 100. Let's work an example: 5 parts per million means 5/1,000,000. The rules of fractions allow us to multiply the numerator and denominator by the same number (except 0). So multiply numerator and denominator by .0001 and we get .0005/100. Another word for .0005/100 is .0005 percent. So the general rule is multiply the parts per million by .0001 or divide by 10,000 (same thing).
that's like 40000 million