90 ppm lead in paint is equivalent to which percent?

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Study for the US EPA Model Lead Inspector Test. Utilize flashcards and multiple choice questions with hints and explanations. Prepare for your certification exam with confidence!

Multiple Choice

90 ppm lead in paint is equivalent to which percent?

Explanation:
Converting ppm to percent uses the fact that 1% equals 10,000 ppm. So the percent value is ppm divided by 10,000. For 90 ppm, 90 ÷ 10,000 = 0.009, which means 0.009%. Quick check: 100 ppm would be 0.01%, 900 ppm would be 0.09%, and 9 ppm would be 0.0009%. The 90 ppm result aligns with 0.009%.

Converting ppm to percent uses the fact that 1% equals 10,000 ppm. So the percent value is ppm divided by 10,000. For 90 ppm, 90 ÷ 10,000 = 0.009, which means 0.009%. Quick check: 100 ppm would be 0.01%, 900 ppm would be 0.09%, and 9 ppm would be 0.0009%. The 90 ppm result aligns with 0.009%.

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