Question 653684
 how to write a negative mixed # such as: 19 3/7- 8 4/5=
The two fractions have to have the same denominator, change to 35th
3/7 = 15/35
4/5 = 28/35
:
19{{{15/35}}}
-8{{{28/35}}}
---------
:
the top numerator is smaller than the bottom numerator, we have to borrow
one from 19, in the form of 35/35th, add to the existing fraction, we have
18{{{50/35}}}
-8{{{28/35}}}
--------- easy subtraction now
10{{{22/35}}}