AAMI Certified Associate in Biomedical Technology (CABT) Practice Exam

Converting Fahrenheit to Celsius uses the formula (F − 32) × 5/9. For 98.6 degrees Fahrenheit, subtract 32 to get 66.6; multiply by 5 to get 333, then divide by 9 to get 37.0. So the Celsius equivalent is 37 degrees. This matches normal human body temperature, which is about 37 C. The other temperatures correspond to different Fahrenheit readings (roughly 95 F for 35 C, 96.8 F for 36 C, and 100.4 F for 38 C), but the exact conversion yields 37 C, making it the correct value.