Fraction Subtraction 7Fc2B9

1. **State the problem:** Simplify the expression $$\left(-\frac{1}{2}\right)-1$$. 2. **Recall the rule:** Subtracting a number is the same as adding its negative. So, $$a - b = a + (-b)$$. 3. **Rewrite the expression:** $$\left(-\frac{1}{2}\right) - 1 = -\frac{1}{2} + (-1)$$. 4. **Find a common denominator:** The denominators are 2 and 1. Convert $$-1$$ to $$-\frac{2}{2}$$ to have the same denominator. 5. **Add the fractions:** $$-\frac{1}{2} + \left(-\frac{2}{2}\right) = -\frac{1}{2} - \frac{2}{2} = -\frac{1+2}{2} = -\frac{3}{2}$$. 6. **Final answer:** $$-\frac{3}{2}$$ or $$-1.5$$.