7/9+1/9=………3/4+1/5=………

7/9 + 1/9 = 8/9

3/4 +1/5= 15/20 + 4/20 = 19/20

[tex] \frac{7}{9}[/tex] + [tex] \frac{1}{9} [/tex] = [tex] \frac{8}{9} [/tex]

[tex] \frac{3}{4} [/tex] + [tex] \frac{1}{5} [/tex] = [tex] \frac{15}{20} [/tex] + [tex] \frac{4}{20} [/tex] = [tex] \frac{19}{20} [/tex]