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Divide both the numerator and the denominator by their greatest common factor.
http://www.kwiznet.com/p/takeQuiz.php?ChapterID=1361&CurriculumID=4 http://www.mathwizz.com/arithmetic/help/help10.htm have a look at these to help you with the answer.
Scientific notation is useful for writing moderately large and small numbers. But, even that will not cope with the seriously big numbers.
Scientific expression.
Average, in a way, is a sort of central value; if you take an "average" of several numbers, some of the numbers will be above, some below, that average.The calculation is to add all the numbers, then divide by the number of numbers (i.e., if you have 10 numbers, add all of them, then divide by 10).