Answer: A. -1 2/3
-2 1/6 - 1 1/4 + 1 3/4 (convert from mixed numbers to improper fractions)
= -13/6 - 5/4 + 7/4 (multiply to have the same LCD)
= -26/12 - 15/12 + 21/12
= -20/12 (convert back to a mixed number)
= -1 8/12 (simplify the mixed number)
= -1 2/3
