simpify (3/16+9/16) (1/4-5/9)
put the fractions over a common denominator.
{(3 + 9)/16}(9/36 - 20/36) <--- make the denominators the same for this 2nd term.
{12/16}*{(9 - 20)/36} ---------- simplify the 1st fraction
(3/4)(-11/36) ---- divde the 3 into the 36.
-11/(4*12)
-11/48
Answer: -11/48