perform the following operations.express your answer in simplest form.
[tex]3 \times \frac{3}{4} \div 1 \times \frac{1}{4} = [/tex]
[tex]4 \times \frac{3}{8} \div 2 \times \frac{1}{3} = [/tex]
[tex] \frac{5}{8} \div \frac{2}{5} = [/tex]
[tex]( \frac{4}{9} \times 3) \div ( \frac{3}{5} - \frac{1}{3} = )[/tex]
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