Multiple choice If a clinical thermometer reads 100o. What will the centigrade thermometer read? 40o 37.7o 110o 20o Reveal answer Fill a bubble to check yourself B Correct answer Explanation The conversion formula from Fahrenheit to Celsius is C = (F - 32) x 5/9. For 100°F: C = (100 - 32) x 5/9 = 68 x 5/9 = 37.78°C, which rounds to 37.7°C. This is the standard temperature conversion between these two scales.