Remember that in fractions the small fractions are greater then big fractions and also remember that this rule doesn't apply with negative fractions and it's the opposite.
[tex]\frac{3}{4} -\frac{7}{10} -\frac{3}{4} \frac{8}{10}[/tex]
[tex]\frac{3}{4} >\frac{8}{10}[/tex]
[tex]\frac{8}{10} >-\frac{7}{10}[/tex]
[tex]-\frac{7}{10} >-\frac{3}{4}[/tex]
[tex]= \frac{3}{4} ,\frac{8}{10} ,-\frac{7}{10}, -\frac{3}{4}[/tex]
Therefore your answers are "3/4, 8/10, -7/10, and -3/4."
Hope this helps.