Which of the two

(i) and have different denominators.

Therefore, we take LCM of 3 and 7 that is 21.

Now,

And,

Since, -24 > -28

Therefore,

Hence,

(ii)

and have different denominators.

Therefore, we take LCM of 9 and 8 that is 72.

Now,

And,

Since, -45 > -56

Therefore,

Hence,

(iii)

and have different denominators.

Therefore, we take LCM of 3 and 5 that is 15.

Now,

And,

Since, -5 > -12

Therefore,

Hence,

(iv)

And,

and have different denominators.

Therefore, we take LCM of 13 and 12 that is 156.

Now,

And,

Since, -91 > -108

Therefore,

Hence,

(v)

and have different denominators.

Therefore, we take LCM of 10 and 5 that is 10.

Now,

And,

Since, -7 > -8

Therefore,

Hence,

(vi)

We can write

and have different denominators.

Therefore, we take LCM of 1 and 5 that is 5.

Now,

And,

Since, -12 > -15

Therefore,

Hence,