Answer:
John is not correct
Step-by-step explanation:
(Unless you meant 5:6)
Make the base question into [tex]\frac{35}{42}[/tex]
simplify as much as possible. I found the Greatest Common Denominator (GCF) of 35 and 42, which was 7
divide 35 and 42 by the GCF (7), and you should get 5:6 as your answer.