Fixed Deposit Formula
Expression: A = P(1 + r/4)^(4t)
Indian bank FDs typically compound quarterly. P=principal, r=annual rate, t=years. Interest = A − P.
Example: ₹2 lakh FD at 7.5% for 3 years
P=200,000, r=0.075, t=3
A = 200,000 × (1.01875)^12
Result: Maturity ≈ ₹2,49,812