Step-by-step explanation:
[tex] = 1 \frac{7}{12} + \frac{13}{20} \\ [/tex]
[tex] = \frac{1 \times 12 + 7}{12} + \frac{13}{20} \\ [/tex]
[tex] = \frac{19}{12} + \frac{13}{20} \\ [/tex]
[tex] = \frac{19}{12} \times \frac{5}{5} + \frac{13}{20} \times \frac{3}{3} \\ [/tex]
[tex] = \frac{95}{60} + \frac{39}{60} \\ [/tex]
[tex] = \frac{90 + 39}{60} \\ [/tex]
[tex] = \frac{129}{60} \\ [/tex]
[tex] = \frac{43}{20} \\ [/tex]
[tex] = 2 \frac{3}{20} \\ [/tex]
...
