Subtracting fractions with unlike denominators

First, make the denominators the same for both fractions:

 

-1/2 = (-1)(4)/(2(4) = -4/8

 

Then simplify the fractions because now you have same denominator for both fractions:

 

-3/8 - 4/8 = -7/8

 

-7/8 is your answer!