Write each decimal as a fraction or mixed number, \( \begin{array}{lll}\text { 21. } 0.25 & \text { 22. } 0.8 \overline{3} & \text { 23. } 5.6\end{array} \)

21. The decimal \(0.25\) can be expressed as the fraction \(\frac{25}{100}\), which simplifies to \(\frac{1}{4}\). So, \(21.0 + 0.25\) can be represented as the mixed number \(21 \frac{1}{4}\). 22. The decimal \(0.8\overline{3}\) means \(0.8333...\), which can be represented as \(\frac{5}{6}\). So, if we add this to 22, we can express it as \(22 + \frac{5}{6}\), which results in the mixed number \(22 \frac{5}{6}\). 23. The decimal \(5.6\) can be converted into a fraction as follows: \(5.6 = 5 + 0.6\). The \(0.6\) is equivalent to \(\frac{6}{10}\), which simplifies to \(\frac{3}{5}\). Thus, \(5.6\) is expressed as the mixed number \(5 \frac{3}{5}\).