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If you're question is referring to finding a percentage once you already have the mass, then all you do is multiply the mass by the percent. Since percent is always out of 100, you divide your percent by 100 to get a decimal form (for example 92% becomes .92). Since calculators don't usually allow for a percentage sign, you take your new-found decimal and multiply it by your mass. I hope this helps

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Q: How do you find the percent of a mass?
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