Calculate the due interest earned by a principal (initial amount of money lent, deposited or borrowed) of 9,000 units (Dollar, Euro, Pound, etc.), from date: Jan 12, 2019, to date: Jan 12, 2022, namely for a period of 1,096 days (36 Months), with an annual simple flat interest rate of 2% if the commission fee (withdrawal or payment) is 0%.

Principal (initial amount), P = 9,000


Annual simple interest rate, R = 2%


From date: Jan 12, 2019


To date: Jan 12, 2022


Duration, T = 1,096 days (36 Months)


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


No. of days in a year, N = 365


I = Simple interest:

I = (P × R × T) ÷ N =


(9,000 × 2% × 1,096) ÷ 365 =


(9,000 × 2 × 1,096) ÷ (365 × 100) =


19,728,000 ÷ 36,500 ≈


540.493150684932 ≈


540.49

B = Amount earned:

B = P + I =


9,000 + 540.493150684932 =


9,540.493150684932 ≈


9,540.49

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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