[tex]5.64=5+0.64\\\\0.64=\dfrac{64}{100}=\dfrac{64:4}{100:4}=\dfrac{16}{25}\\\\therefore\ 5.64=5+\dfrac{16}{25}=\boxed{5\frac{16}{25}}\\----------------\\4.85=4+0.85\\\\0.85=\dfrac{85}{100}=\dfrac{85:5}{100:5}=\dfrac{17}{20}\\\\therefore\ 4.85=4+\dfrac{17}{20}=\boxed{4\frac{17}{20}}[/tex]
