Respuesta :

0.4 is 2/5

0.64 is 16/25

2.75 is 11/4
gmany

[tex]0.4=\dfrac{4}{10}=\dfrac{4:2}{10:2}=\dfrac{2}{5}\\\\0.64=\dfrac{64}{100}=\dfreac{64:4}{100:4}=\dfrac{16}{25}\\\\2.75=2+0.75=2+\dfrac{75}{100}=2\dfrac{75:25}{100:25}=2\dfrac{3}{4}[/tex]

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