Science often looks at observed trends by using simple mathematical explanations. A fraction is simply one value divided by another value. This is often known as a vulgar fraction (as opposed to a decimal fraction) Fractions can be used in science to express relationships between values (either as numbers or algebraic values) For example, the numerical relationship between distance and time reveals speed. speed = distance / time The value above the line in a vulgar fraction is known as a numerator The value below the line in a vulgar fraction is known as a denominator In the equation speed = distance / time , which of the values is a numerator? distance is a numerator time is a numerator distance/time is a numerator There is no numerator in the equation