1. The problem is to write the decimal number -0.375 as a fraction. 2. Recall that decimals can be converted to fractions by expressing the decimal part over a power of 10. For example, 0.375 means 375 thousandths, or \frac{375}{1000}. 3. Write -0.375 as a fraction: $$-0.375 = -\frac{375}{1000}$$ 4. Simplify the fraction by finding the greatest common divisor (GCD) of 375 and 1000. The GCD is 125. 5. Divide numerator and denominator by 125: $$-\frac{375 \div 125}{1000 \div 125} = -\frac{3}{8}$$ 6. Therefore, the decimal -0.375 as a simplified fraction is $$-\frac{3}{8}$$.