Calculate the due interest earned by a principal (initial amount of money lent, deposited or borrowed) of 100 units (Dollar, Euro, Pound, etc.), from date: May 2, 472, to date: Jun 2, 2017, namely for a period of 564,330 days (18,541 Months), with an annual simple flat interest rate of 2.5% if the commission fee (withdrawal) is 0%.

Principal (initial amount), P = 100


Annual simple interest rate, R = 2.5%


From date: May 2, 472


To date: Jun 2, 2017


Duration, T = 564,330 days (18,541 Months)


Commission fee (withdrawal), F = 0%


No. of days in a year, N = 365


I = Simple interest:

I = (P × R × T) ÷ N =


(100 × 2.5% × 564,330) ÷ 365 =


(100 × 2.5 × 564,330) ÷ (365 × 100) =


141,082,500 ÷ 36,500 ≈


3,865.27397260274 ≈


3,865.27

B = Amount earned:

B = P + I =


100 + 3,865.27397260274 =


3,965.27397260274 ≈


3,965.27

Signs: % percent, ÷ divide, × multiply, = equal, ≈ approximately equal;

Writing numbers: comma ',' as thousands separator; point '.' as a decimal mark;

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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