The fraction may be simplified when the numerator and denominator have a common factor greater than one. Units are often referred to as ones. Eg, 4∙2 has 4 units and 2 tenths, or you could say 4∙2 has ...

In order to graduate from high school, people usually spend about13 years (K-12) learning about math concepts. One of the things that math does is to give us a universal way to think about quantities.