Question 256826
10 divided by 1/5 is the same as multiplying by 5 so the quotient is 50

Lowest would be -5 divided by 1/5 with -25 as the quotient.
10 divided by -1/2 is the same as multiplying by -2 so the quotient is -20.

Two things to remember are that negative is lower than plus (positive) and that 
dividing by a fraction is the same as multiplying by its reciprocal.