A student of Mathematics has various career options available for him/her. From your percentage it can be assumed that you have real depth in higher Mathematics, so you can go for any of these options according to your own inclination.
If you want to appear in various competitive examinations for Government jobs, you are on equal footing with students of other subject. However, a student of Mathematics automatically gets more advantage in objective type competitive examinations because of his/her logical deduction ability which gradually develops during study of Mathematics. I am telling this from my personal experience as a student of Mathematics.
If you want to pursue higher studies in Mathematics, you will get this facility (higher study in Mathematics) in almost all Universities of India. You can study Mathematics at Master's level and Doctoral level in IITs and ISIs also. After completion of higher studies, you may join teaching profession as a lecturer in a college or as a teacher in a school.
In addition, as a student of Mathematics, you can also join the profession of Actuary and can also study Computer Programming. Actuarial Science is an extremely challenging assignment for good students of Mathematics. It uses mathematical, probability and statistical models for calculating life expectancy and insurance premia.
Best of luck!
Beware! I question everything and everybody.