Respuesta :
[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]
[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]