When dividing fractions it is easy. We just need to multiply it by the inverse of the fraction.
If we're diving by 2/5, it is the same as multiplying 5/2, its inverse.
So:
[tex]\frac{6}{7}(\frac{5}{2})=\frac{6(5)}{7(2)}=\frac{30}{14}=\frac{15}{7}[/tex]