Mark M. answered 12/07/14
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Mathematics Teacher - NCLB Highly Qualified
n = the sum of the 16 numbers
n/16 = the average of the 16 numbers
the sum (n) is (=) what (x) /100 of (multiply) the average
n = x/100 · n/16
16 n = x/100 · n
16 = x/100
1600 = x
The sum is 1600% of the average.