# Simple Interest Calculator: Aptitude Test

1 What is Simple interest?

The percentage of the principal that is paid over a certain period of time is called the interest rate. Interest is typically calculated over principal amount (Base Amount).

Simple Interest is considered when time period is generally less than a year. Simple interest is calculated only on principal amount and Simple interest formula is as follows

$I=\frac{\mathrm{\left( P × n × r \right)}}{100}$
Where
I = Interest Amount
P = Principal Amount
n = Time period
r = Rate of interest

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2 How to calculate Interest earned?
3 How to calculate Principal Amount?
4 How to calculate Rate of Interest?
5 How to calculate time period?
6 How to calculate Amount accrued i.e. principal + interest earned?
Simple Interest Calculator

 Calculate Principal (P) Interest (I) Period (n) Rate of Interest (r) Principal + Interest (P + I)
 Interest Amount (I) Period (n) Rate of Interest (r) (% per year)

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