Elmer has a collection of 300 fossils. of these, 21% percent are fossilized snail shells.
how many fossilized snail shells does elmer have?

Importance should be given to all the information’s already given in the question.Number of fossils that Elmer has = 300
Percentage of snail shell fossils = 21%
Then
Number of snail shell fossils that Elmer has = (21/100) * 300
                                                                       = 21 * 3
                                                                       = 63
So Elmer has 63 snail shell fossils.I hope the procedure is absolutely clear to you and the answer is also correct. Following this procedure it will be possible for you to solve such question with ease in future. 

Thats where they was ported and the fields that noone really knew much about needed tended, so they put slaves out there do free work and huge profits and so on the north decided to hold its own and was more different way of survival did not have same climate conditions to afford protecting slaves from winter so expenses be diff from south