What are my chances of getting into yale or any other ivy?

I am a 12th grade student in India(CBSE). My high school marks are as follows:
9th: CGPA 7.8
10th: CGPA 8
11th: 68%
My extracurriculars are:
Debating (which is one of my 2 passion): took part in 15 devating competitions came top 5 in all of them.
Started and am the president of my schools debating club.
2. World’s Scholar’s Cup: Took part in this; it is an academic competition whoose final round is held at yale. Came 11th in asia and 33 out of 800 people as well as in the top 30 of all the categoeries
DK Book quiz 9th grade: came 1st along with my teammate out of 48 teams
3. Economics: founded and am the vice president of the schools economics club.
Took an online couse in investment banking taught by a yale proffessor and got great marks in that.
4. Organising events in school: Organised 3 Events in school. Events are:
A. MUN: our school held an MUN and I was one in one of the top 3 leadership positions as Charge d’affaires.
B. School’s carinival: Was head of the finance comittee for the schools carnival.
C. SPAGOR: Debating competion held by my school of which i was Chief advisor.
5. Community service: Worked for an NGO in helping them educate govt school children, taught math and sst to 8 and 9 grade kids.

SAT , SAT 2 and TOEFL scores:
SAT: 1600;800;800
TOEFL: 113
SAT2:
Math 2: 800
American history: 800

Thoose are my stats.
How badly will my school marks effect my overall admissions chances?(I also had medical problems during thoose 3 years which effected me and once i was completly treated i gave my SAT and TOEFL and got thoose results).

And i also have interned at a finicial services company for 5 months.

I’m not sure if the criteria Ivies look at for international students is different, but GPA is a big factor for US students atleast. Can you explain the grading of your 9th and 10th grade reports? Also, why is there a change from 9th/10th and 11th in terms of how you were graded? What is the 68% based on? Your SAT and SATII scores are exceptional (not sure how to interpret TOEFL), and your ECs are very good as well. Usually, there is a section on college applications (atleast for domestic students) that allows you to justify any low grades or scores you may have put on your application. If international students use the same application, I would talk about the medical problems you had through high school there - that should be good enough for schools. Many schools should put a lot of weight on your SAT scores, so having a perfect 1600 is great for that. As you probably know, Ivies are very selective and you can never be sure what would separate one candidate from another in their eyes, and which candidate gets in. I would say you would be a competitive applicant to Ivies, but my knowledge is rooted in domestic students, and I’m not quite sure how acceptance rates and application processes change for international students. Basically, if you were residing in the US, I would say you would be a competitive applicant for acceptance. Beyond that, maybe someone else could help you. My parents are both from India as well, so it is good to see more people coming over to the United States! GL!

Thanks for the help. The grading system changes from a CGPA to percentage in CBSE. So in 9th and 10th all subjects were compulsory and we were given letter grades from A1,2,B1,2,C1,2,D,E1,2 and E were fail. All grades had points
A1: 10
A2:9
B1:8
B2:7
C1:6
C2:5
D:4
And the CGPA was calculated by taking the average of all the points of the letter grade scored.
There is a change to percentage in 11th because in class 12 CBSE gives out percentages which are used by indian colleges to set a cutoff as they only look at marks and nothing else.
11th percentage is just the average of all the marks scored in the 5 subjects that i had.

They illness section is it in the CommonApp as i would use that to apply?

Though your grades are kind of low for such colleges, you have amazing test scores and good ECs. Ivies take grades a lot into account, but if you had high class rigor, went to a strict competitive school in addition to your illness, I think they will pay more attention to the rest. Of course you have good chances, but keep in mid to find some matches and safeties as well, because Ivies have an extremely low acceptance rate. Good luck!

@constantdoer curriculum in India is same all across the country, and is really tough especialle grade 11 and 9. Thanks for the advice though.