Question 23219
1. What is (1/6) divided by (-5/8)
{{{(1/6)*(8/-5)= 8/-30 = -4/15}}}

 
2. What is {{{(5/16)+ (11/24)}}} 
LCD is the hard part here.  Take multiples of 24 until you find one that is divisible by 16.  That would be LCD= 48.
{{{(5/16)+ (11/24)}}} 
{{{(5/16)*(3/3)+ (11/24)*(2/2)}}}
{{{(15 + 22)/ 48}}}
{{{37/48}}}
 

3. What is {{{(3/7)+(-2/9)}}}
LCD = 63
{{{(3/7)+ (-2/9)}}} 
{{{(3/7)*(9/9)+ (-2/9)*(7/7)}}} 
{{{(27-14)/63}}}
{{{13/63}}}


R^2 at SCC