280 is what percent of 400?

It would be 7% because .7 is a decimal so if you convert it into a percent it will be 7%

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.