Hello Aspirant,

Hope you are doing well

To improve your percentile from 80 to 97 in JEE Mains then you will revise the topics and cover the high weightage topic first and solve previous year paper. You make schedule than follow that schedule and cover all topics and solve papers this will help you to maintain accuracy and time management.

I'll tell you the topic whose score  more you will cover these topic first:-

Physics:-

• Modern Physics - 20 marks
• Heat and Thermodynamics Optics - 12 marks
• Optics - 12 marks
• Current Electricity -12 marks
• Electrostatics - 12 marks
• Magnetics - 8 marks

Chemistry:-

• Transition Elements and Coordination Chemistry - 12 marks
• Periodic table and Representative Elements - 12 marks
• Thermodynamics And Gaseous State - 8 marks
• Atomic Structure - 8 marks
• Chemical Bonding - 8 marks
• Chemical And Ionic Equilibrium - 8 marks
• Solid State And Surface Chemistry - 8 marks
• Nuclear Chemistry And Environment - 8 marks

Mathematics:-

• Coordinate Geometry - 20 marks
• Limits, Continuity and Differentiability - 12 marks
• Integral Calculus - 12 marks
• Complex numbers and Quadratic Equation - 8 marks
• Matrices and Determinants - 8 marks
• Statistics and Probability - 8 marks
• Three Dimensional Geometry - 8 marks
• Vector Algebra - 8 marks.
  

first you cover these topics then go with other topics whose weightage is low:-

Physics:-

• Unit, Dimension and Vector - 4 marks
• Kinematics - 4 marks
• Laws of motion - 4 marks
• Work, Power and Energy - 4 marks
• Centre Of Mass, Impulse and Momentum - 4 marks
• Rotation - 4 marks
• Gravitation - 4 marks
• Simple Harmonic Motion - 4 marks
• Solids and Fluids - 4 marks
• Waves - 4 marks
• Electromagnetics Induction ; AC - 4 marks
  

Chemistry:-

• Mole Concept - 4 marks
• Redox Reaction - 4 marks
• Electrochemistry - 4 marks
• Chemical Kinetics - 4 marks
• Solution and Colligative Properties - 4 marks
• General Organic Chemistry - 4 marks
• Stereochemistry - 4 marks
• Hydrocarbon - 4 marks
• Alkyl Halides - 4 marks
• Carboxylic Acid and their Derivatives - 4 marks
• Carbohydrates,amino acid and Polymers - 4 marks
• Aromatic Compounds - 4 marks

Mathematics:-

• Sets, Relation and Function - 4 marks
• Permutations and Combinations - 4 marks
• Binomial Theorem and Its Application - 4 marks
• Sequences and Series - 4 marks
• Trigonometry - 4 marks
• Mathematical Reasoning - 4 marks
• Differential Equation - marks
• Statics and Dynamics - 4 marks
• Differential Calculus - 4 marks

For more information, I'm providing you a link:-

https://engineering.careers360.com/articles/jee-main-syllabus-weightage

I hope this information will help you.

Feel free to ask any query.

All the best.