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## Homework Statement

Given that y is directly proportional to the cube of x and inversly proportional to the square of z, if x decreases by 23.3% and z increases by 45.3%, by what factor does y change?

## Homework Equations

Couldn't make a equation but I tried like this:

y=K/x^3+1/z^2

## The Attempt at a Solution

I couldn't get the question and where to start adding variables into the equation.

I think the equation is wrong to me though. Someone help?

(am I in the right thread for this question?)

Also my English is sort of weak so please make statement simple as possible. :)