addition of negative exponents in a fraction

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i am very confused how to simplify this considering there is addition (and not multiplication) of negative exponents in both numerator and denominator.

$$\frac{8^{-4/3} + 2^{-2}}{16^{-3/4}+2^{-1}}$$

Since there is addition, i cannot just do the reciprocal of the fraction to remove the negative from the exponents, so how is one supposed to solve this?

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got it from the comments!!! fraction converted to power of 2 simplifies to:

$$\frac{2^{-4}+2^{-2}}{2^{-3}+2^{-1}}$$

then i take common factor:

$$\frac{2^{-2}(2^{-2}+1)}{2^{-1}(2^{-2}+1)}$$

results in $$\frac{1}{2}$$