(i) Clearly,

(ii)

and have different denominators.

Therefore, we take LCM of 13 and 91 that is 91.

Now,

And,

Clearly,

Hence,

(iii) We can write

and have different denominators.

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

Now,

And,

Since, -10 > -13

Therefore,

Hence,

(iv)

and have different denominators.

Therefore, we take LCM of 3 and 8 that is 24.

Now,

And,

Since, -16 < -15

Therefore,

Hence,

(v)

is a positive number and all positive numbers are greater than 0.

Therefore,

Hence,

(vi) and have different denominators.

Therefore, we take LCM of 9 and 10 that is 90.

Now,

And,

Since, -80 > -81

Therefore,

Hence,