Explicație pas cu pas:
[tex] = (\frac{25}{100} + \frac{27 - 2}{90} ) \div \frac{63 - 6}{9} = \\ \\ = ( {}^{9)} \frac{25}{100} + {}^{10)} \frac{25}{90}) \div \frac{57}{9} = \\ \\ = \frac{225 + 250}{900} \times \frac{9}{57} = \\ \\ = \frac{475}{900} \times \frac{9}{57} = \\ \\ = \frac{475}{100} \times \frac{1}{57} = \\ \\ = \frac{475}{5700} = \\ \\ = \frac{75}{90} = \\ \\ = \huge 0.8(3)[/tex]
