The document discusses compound interest formulas and provides examples of calculating compound amounts over time at different compounding periods. Specifically: - The formula for compound interest is A = p(1 + i/m)^(m*t) where A is the amount, p is the principal, i is the annual interest rate, m is the number of compounding periods per year, and t is the number of years. - Examples are provided to calculate the compound amount of Rs. 6500 over 4 years at 6% interest compounded semi-annually, quarterly, and monthly. - The final example shows how to calculate the present value (principal) of Rs. 8248.41 due in 4