Calculate the due interest earned by a principal (initial amount of money lent, deposited or borrowed) of 10,000 units (Dollar, Euro, Pound, etc.), from date: Jul 2, 2018, to date: Jul 2, 2023, namely for a period of 1,826 days (60 Months), with an annual simple flat interest rate of 75% if the commission fee (withdrawal or payment) is 0%.

Principal (initial amount), P = 10,000


Annual simple interest rate, R = 75%


From date: Jul 2, 2018


To date: Jul 2, 2023


Duration, T = 1,826 days (60 Months)


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


No. of days in a year, N = 365


I = Simple interest:

I = (P × R × T) ÷ N =


(10,000 × 75% × 1,826) ÷ 365 =


(10,000 × 75 × 1,826) ÷ (365 × 100) =


1,369,500,000 ÷ 36,500 ≈


37,520.547945205479 ≈


37,520.55

B = Amount earned:

B = P + I =


10,000 + 37,520.547945205479 =


47,520.547945205479 ≈


47,520.55

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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