Question

arrange the following rational numbers in descending order (-4)/7,(-9)/14,13/(-28),(-23)/42​

Answer 1

first we will take lcm of all the denominator

7l_7,14,-28,42__

2l_1,2,-4,6______

- 2l_1,1,-2,3______

3 l_1,1,1,3_______

l_1,1,1,1______

so the lcm is7×2×-2×3=14×-6= 84

12×-4,-9×6,13×-3,-23×2/84

-48,-54,-39,-46/84

-39/84 > -46/84 >-48/84>-54/84

=13/-28 > -23/42> -4/7 > -9/14