90 ppm lead in paint is equivalent to which percent?

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Prepare for the US EPA Model Lead Inspector Test. Study with flashcards and multiple choice questions. Each question includes hints and explanations for better understanding. Ace your exam!

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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