з) $$ \frac{7}{25} + 2,15 = \frac{7}{25} + \frac{215}{100} = \frac{7 \cdot 4}{25 \cdot 4} + \frac{215}{100} = \frac{28}{100} + \frac{215}{100} = \frac{243}{100} = 2,43$$
Ответ: 2,43