How do you know where to place a decimal in a quotient?

Divide. Place decimal point in the quotient. It should be placed directly above the decimal point in the dividend.

This makes absolutely no sense at all young man/women

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.