Răspuns:
[tex]f = 2 \frac{5}{8} \times \frac{2}{9} + \frac{3}{8} [/tex]
[tex]f = \frac{2 \times 8 + 5}{8} \times \frac{2}{9} + \frac{3}{8} [/tex]
[tex]f = \frac{16 + 5}{8} \times \frac{2}{9} + \frac{3}{8} [/tex]
[tex]f = \frac{21}{8} \times \frac{2}{8} + \frac{3}{8} [/tex]
[tex]f = \frac{21 \times 2}{8 \times 9} + \frac{3}{8} [/tex]
[tex]f = \frac{42}{8 \times 9} + \frac{3}{8} [/tex]
[tex]f = \frac{42}{72} + \frac{3}{8} [/tex]
[tex]f = \frac{7}{12} + \frac{3}{8} [/tex]
[tex]f = \frac{23}{24} [/tex]
