Answer:
[tex]\frac{7}{4}[/tex] local calls per 1 long distance call.
Step-by-step explanation:
Local calls [tex]=35[/tex]
Long distance calls [tex]=20[/tex]
For 20 long distance calls local call [tex]=35
For 1 long distance calls local call [tex]=\frac{35}{20} =\frac{7}{4}[/tex]