'P for GDP Percentage' and 'D for Dollar per person'. P = GDP%, D = USD per head. This one trick solves all formula-based questions instantly.
--- WORKED EXAMPLE ---
Question: India's total insurance premium in a year is ₹8 lakh crore. GDP is ₹200 lakh crore.
Population is 100 crore. Total premium in USD terms is $100 billion. Find Insurance Penetration and Insurance Density.
Step 1 — Insurance Penetration:
Penetration = (8 ÷ 200) × 100 = 4%
Step 2 — Insurance Density:
Density = $100 billion ÷ 100 crore people = $100 per person
Answer: Penetration = 4%, Density = $100
This is exactly how exam questions are framed. Always check the unit — penetration is in %, density is in USD.
--- COMMON MISTAKE ---
Students confuse penetration with density