Students: Anup, Amit, Abhi, Avinash, Amitesh, Aarohi, Amar, and Aditi.

Ranks: 1st, 2nd, 3RD, 4th, 5th, 6th 7th and 8th.

1) Avinash GOT 7th lowest rank (It means 2nd rank).

2) Aarohi got 4th lowest rank (i.e. 5th rank).

3) Aarohi got higher rank than Amar.

4) Abhi got higher rank than Amar but lesser rank than Aarohi.

Note: Highest means 1st rank and lowest means 8th rank.

 Case 1:$

________ > Avinash > ________ > ________ > Aarohi > Abhi > Amar > $________$

Case 2:$

 ________ > Avinash > ________ > $________$ > Aarohi > Abhi > $________$ > Amar$

Case 3:$

 ________ > Avinash > ________ > $________ > Aarohi > ________$> Abhi > Amar$

5) Only three students got higher ranks than Aditi.

6) Amitesh got LESS rank than Amar.

(Case 2 and 3 will be ELIMINATED here.)

7) Anup got higher rank than Amit.

8) Aditi did not get the highest or lowest rank.

Final Arrangement:

Anup > Avinash > Amit (80%) > Aditi > Aarohi > Abhi > Amar > Amitesh

Since Aditi’s rank is less than Amit so her percentage also will be less than Amit i.e. 72%.