Question: Expression with products in both numerator and denominator cannot be simplified

I have an expression  

product(q^(n -2)- q^i, i = 0 .. r )/product(q^(n-2) - q^(i+1), i = 0 .. r)

 

Obviously, it can be further simplified.

But in maple I can't do that, I use simplify and expand , all failed.

simplify(expand(%))

What should I do to get the simplified result I want?

 

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