NAPLEX (North American Pharmacist Licensure Examination) Practice Exam

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Ace your North American Pharmacist Licensure Examination (NAPLEX) with our comprehensive practice test. Features include interactive flashcards, multiple-choice questions, with detailed hints and explanations. Fast-track your pharmacy career today!

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When converting PPM to percentage strength, in which direction is the decimal point moved?

Left 2 places
Right 2 places
Left 4 places
Right 4 places

The correct answer is: Left 4 places

When converting parts per million (PPM) to percentage strength, you need to move the decimal point to the left four places. This is because one percent is equal to 10,000 parts per million (10,000 ppm). Therefore, to convert from PPM to percentage, you need to divide the PPM value by 10,000, which effectively moves the decimal point to the left four places. This makes choice C the correct answer. Moving the decimal point in any other direction, such as left two places (option A) or right two places (option B) or right four places (option D), would result in an incorrect conversion from PPM to percentage strength.