Question 807828
<pre>
{{{1&1/2*1&1/3*1&1/4*"..."*1&1/99*1&1/100}}}{{{""=""}}}

Change all the mixed numbers to improper fractions:

{{{expr(3/2)*expr(4/3)*expr(5/4)*"..."*expr(100/99)*expr(101/100)}}}{{{""=""}}}{{{expr(cross(3)/2)*expr(cross(4)/cross(3))*expr(cross(5)/cross(4))*expr(""/cross(5))*"..."*expr(cross(99)/"`")*expr(cross(100)/cross(99))*expr(101/cross(100))}}}

Everything cancels except the denominator 2 in the first 
factor, and the numerator 101 in the last factor.  So the 
product is {{{101/2}}} or as a mixed number {{{50&1/2}}}.

Edwin</pre>