Math Problem Solver

\[ 39.80 - 199 = - \frac{796}{5} = -159.2 \]

The sum can be computed by rewriting each term over a common denominator, where the least common denominator of \(\frac{39}{1}\), \(\frac{8}{10}\), and \(\frac{-199}{1}\) is \(10\). \[ \begin{aligned} 39.80 - 199 &= \frac{39 \cdot 10}{1 \cdot 10} + \frac{8 \cdot 1}{10 \cdot 1} + \frac{-199 \cdot 10}{1 \cdot 10} \\ &= \frac{390 + 8 + -1990}{10} \\ &= \frac{-1592}{10} \\&= - \frac{796}{5} \end{aligned} \]