What is two and seven eights as an improper fraction?

23/8 is the answer. Because you do denomiinator times whole. That answer plus numerator

2 and 7 eights is 23 eights.
because 8x2+7 is 23 

The major difference is that a histogram is only used to plot the frequency of score occurrences in a continuous data set that has been divided into classes, called bins.  bar charts, on the other hand, can be used for a great deal of other types ofvariables  including  ordinal  andnominal  data sets.