Calculate the due interest earned by a principal (initial amount of money lent, deposited or borrowed) of 150,000 units (Dollar, Euro, Pound, etc.), from date: Dec 7, 2017, to date: Dec 7, 2037, namely for a period of 7,305 days (240 Months), with an annual simple flat interest rate of 2.7% if the commission fee (withdrawal or payment) is 0%.

Principal (initial amount), P = 150,000


Annual simple interest rate, R = 2.7%


From date: Dec 7, 2017


To date: Dec 7, 2037


Duration, T = 7,305 days (240 Months)


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


No. of days in a year, N = 365


I = Simple interest:

I = (P × R × T) ÷ N =


(150,000 × 2.7% × 7,305) ÷ 365 =


(150,000 × 2.7 × 7,305) ÷ (365 × 100) =


2,958,525,000 ÷ 36,500 ≈


81,055.479452054795 ≈


81,055.48

B = Amount earned:

B = P + I =


150,000 + 81,055.479452054795 =


231,055.479452054795 ≈


231,055.48

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

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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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