Answer:
John is not correct
Explanation:
(Unless you meant 5:6)
Make the base question into
![(35)/(42)](https://img.qammunity.org/2021/formulas/mathematics/high-school/v8sz6npb7q62zgifm7ioosyy2k5nkodhrv.png)
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.