The first inequality is false:
[tex]\frac{8}{5}<\frac{9}{10}[/tex]Mainly because 9/10 is less than 1, and 8/5 is greater than 1.
The second inequality is false:
[tex]1>\frac{6}{5}[/tex]Because 6/5 is greater than 1.
The third inequality is false:
[tex]\frac{5}{2}<2\frac{1}{2}[/tex]Because these numbers are equal to 2.5.
The fourth inequality is true:[tex]\frac{8}{4}<\frac{5}{1}[/tex]Because 8/4 is equal to 2, which is less than 5.
