Bonsoir,

[tex]Y=\frac{25}{4} -\frac{3}{2} +\frac{7}{4} \\\\Y=\frac{25}{4} -\frac{6}{4} +\frac{7}{4} \\\\Y=\frac{26}{4} \\\\Y=\frac{13}{2}\\ \\Y=6,5[/tex]

[tex]G=\frac{27}{35} *\frac{21}{36} \\\\G=\frac{567}{1260} \\\\G=\frac{567/63}{1260/63}\\ \\G=\frac{9}{20} \\\\G=0,45[/tex]

[tex]R=\frac{18}{7} /\frac{15}{14} \\\\R=\frac{18}{7} *\frac{14}{15}\\\\R=\frac{252}{105}\\ \\R=\frac{252/21}{105/21}\\\\R=\frac{12}{5} \\\\R=2,4[/tex]

[tex]A=\frac{7}{28} -\frac{1}{7} +\frac{5}{4} \\\\A=\frac{7}{28} -\frac{4}{28} +\frac{35}{28} \\\\A=\frac{38}{28} \\\\A=\frac{38/2}{28/2}\\\\A=\frac{19}{14} \\[/tex]≈ 1,36

G < A < R < Y