求一道数学题！急！急！~~~

/x/+/x-1/+/x-2/+/x-3/+/x-4/+/x-5/
=x+x-1+x-2+x-3+x-4-x+5

=4x-5

=4×4又400/1-5

=4×400/1601-5

=16.01-5

=11.01

=160100-5

=16

-1.01???

是等于6Χ+16

题目是四又四百分之一吧，那么算结果是11.01，分数表示是400分之4404