Question 7402
When faced with a problem with decimals, put it in fraction form:


-12.1/-0.11 


-12{{{1/10}}} / {{{-11/100}}}


{{{121/10}}}/-{{{11/100}}}


At this point, you can change the problem from a division to a multiplication problem by using the reciprocal of -{{{11/100}}} which is -{{{100/11}}}
{{{121/10}}}*-{{{100/11}}}


simplify
(11)(-10)
=-110