Rates & Unit ConversionHESI A2 cheat sheet

Per one, and cancelling units

6 key facts 3 practice questions Reviewed Oct 2026

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Unit Rate

Divide to get the amount per one
$18 for 3 h = $6 per hour

Dimensional Analysis

Write conversions as fractions so unwanted units cancel
Keep the target unit on top

Clinical Rates

mL per hour, drops per minute, mg per kg

Check

The surviving unit must be the one the question asked for

Key takeaway

Per one, and cancelling units

Before you read

Test yourself first: 3 questions

Question 1 of 3

If 8 pens cost $6, how much do 20 pens cost at the same rate?

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