Solution
For this case we have the following ratio given
7/10
We can do the following:
[tex]\frac{21}{30}=\frac{7}{10}[/tex][tex]\frac{17}{20}=\frac{17}{20}[/tex][tex]\frac{10}{13}=\frac{10}{13}[/tex][tex]\frac{26}{40}=\frac{13}{20}[/tex][tex]\frac{35}{50}=\frac{7}{10}[/tex]Then the final answer is:
A) 21:30 and E) 35:50
