Ok first we multiply by the reciprocal AKA Keep change flip
We are left with 80y^4/49z^5v^7 Multiplied by 14z^12v^5/25y^5
Next we would start simplifying the expressions in order to size down the problem.
Cancel out the common factors z^5, y^4, v^5 and you are left with
80/49v^2 multiplied by 14z^7/25y
Were not done just yet though, now we would look for the GCF (Greatest common factors) in the equations.
We divide both 80 and 25 by 5
and
We also divide 14 and 49 by 7.
We are now left with a much more simple problem
16/7v^2 Multiplied by 2z^7/5y
All that is left to do now is multiply and after doing so you would get a
Final answer of 32z^7/35v^2 y