Question 697295
If {{{4 < a < 7 < b <9 }}}, then {{{4 < a < 7}}} and {{{7 < b < 9}}}

so 
4<a<7
7<b<9
---------{{{a/b}}} will be
4/7<a/b<7/9


c. {{{4/7 < a/b < 7/9 }}} best defines {{{a/b}}}