[tex]3.4 = 3 \frac{4}{10} = 3 \frac{4 \div 2}{10 \div 2} = 3 \frac{2}{5} [/tex]
[tex]0.02 = \frac{2}{100} = \frac{2 \div 2}{100 \div 2} = \frac{1}{2} [/tex]
[tex]2.004 = 2 \frac{4}{1000} = 2 \frac{4 \div 4}{1000 \div 4} = 2 \frac{1}{250} [/tex]
[tex]6.35 = 6 \frac{35}{100} = 6 \frac{35 \div 5}{100 \div 5} = 6 \frac{7}{20} [/tex]