Which of the following fractions has the greatest value?
~$\frac{1}{3^{2}5^{2}}$~
~$\frac{2}{3^{2}5^{2}}$~
~$\frac{7}{3^{3}5^{2}}$~
~$\frac{45}{3^{3}5^{3}}$~
~$\frac{75}{3^{4}5^{5}}$~
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