You can put this solution on YOUR website! 2^2 x^6 y^-5 / 2^4 x^-3 y^-11
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= (4*x^6/y^5) / (16/(x^3*y^11))
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Invert the denominator and multiply:
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= (4*x^6/y^5) * ((x^3*y^11)/16)
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= (4/16)(x^9)(y^11/y^5)
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= (1/4)x^9y^6
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Cheers,
Stan H.