Quantitative Aptitude - Compound Interest - Formula & Concept Tutorial

Principal – P , Rate – R % per annum, Time = n year

1. When Interest is compounded annually

Amount =

2. When Interest is compounded half yearly

Amount =

3. When Interest is compounded Quaterly

Amount =  

4. When Interest is compounded annually, but time is in fraction, say  years

Amount =

5. When Rates are different for different year, say R1%, R2%, R3% for 1^st, 2^nd and 3^rd year respectively

Then, Amount =

6. Present worth of Rs x , due n year hence is given by

Present Worth =

7. Compound Interest ( CI ) = Amount – Principle
8. When rate of interest is compounded ‘a’ times a year

Amount =