Calculate the due interest earned by a principal (initial amount of money lent, deposited or borrowed) of 6,500 units (Dollar, Euro, Pound, etc.), from date: Jun 30, 2016, to date: Sep 30, 2016, namely for a period of 92 days (3 Months), with an annual simple flat interest rate of 0.5% if the commission fee (withdrawal or payment) is 0%.

Principal (initial amount), P = 6,500


Annual simple interest rate, R = 0.5%


From date: Jun 30, 2016


To date: Sep 30, 2016


Duration, T = 92 days (3 Months)


Commission fee (withdrawal or payment), F = 0%


No. of days in a year, N = 365


I = Simple interest:

I = (P × R × T) ÷ N =


(6,500 × 0.5% × 92) ÷ 365 =


(6,500 × 0.5 × 92) ÷ (365 × 100) =


299,000 ÷ 36,500 ≈


8.191780821918 ≈


8.19

B = Amount earned:

B = P + I =


6,500 + 8.191780821918 =


6,508.191780821918 ≈


6,508.19

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Calculate simple flat rate interest on a principal borrowed, lent

Simple flat rate interest = (Principal × Annual simple flat interest rate × Duration in days) ÷ Number of days in a year

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