Mathematics - TEAS Study Guide | Nurse.org
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Ratios & Proportions

Why This Matters for Nursing: Medication mixing, IV drip rates, and staffing calculations all use ratios. "Mix 1 part medication to 3 parts saline" or "1 nurse for every 4 patients" are ratios you'll use daily.

What You Need to Know

A ratio compares two quantities. It can be written three ways:

  • 1 to 3
  • 1:3
  • 1/3

A proportion states that two ratios are EQUAL:

  • 1:3 = 2:6 (both simplify to the same ratio)

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