2.
1st pair:
[tex] \frac{8}{10} \: \: and \: \: \frac{4}{5} [/tex]
2nd pair:
[tex] \frac{7}{10} \: \: and \: \: \frac{35}{50} [/tex]
3rd pair:
[tex] \frac{3}{10} \: \: and \: \: \frac{30}{100} [/tex]
4th pair:
[tex] \frac{1}{2} \: \: and \: \: \frac{5}{10} [/tex]
Leftover:
[tex] \frac{4}{10} \\ [/tex]
