Make a fraction
[tex] \dfrac{2.7}{6.3} [/tex]
Divide the numerator and denominator by their greatest common factor
The greatest common factor of 2.7 and 6.3 is 0.9
[tex] \dfrac{2.7:0.9}{6.3:0.9} [/tex]
[tex] \dfrac{3}{7} [/tex]
The simplest fraction is 3/7