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Review: Fraction of Many Decimals
Explanation
In this question, as in general, we will try to cancel as
much as possible before doing any substantial computation. First, we can put
all the terms in scientific notation and do a roundup of the powers of ten:
Meanwhile, 
cancels partly to yield 
,
which is 
or 
.
So we are favoring answer choice (A) at this point, based on that basic order
of magnitude. In the left factor, we can cancel the 4 partly with the 1.6 and
the 3 with the 2.4 to get:
The correct answer is (A).
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