Calculate the due interest earned by a principal (initial amount of money lent, deposited or borrowed) of 18,000,000 units (Dollar, Euro, Pound, etc.), from date: May 10, 2017, to date: Dec 10, 2017, namely for a period of 214 days (7 Months), with an annual simple flat interest rate of 732% if the commission fee (withdrawal) is 0%.

Principal (initial amount), P = 18,000,000


Annual simple interest rate, R = 732%


From date: May 10, 2017


To date: Dec 10, 2017


Duration, T = 214 days (7 Months)


Commission fee (withdrawal), F = 0%


No. of days in a year, N = 365


I = Simple interest:

I = (P × R × T) ÷ N =


(18,000,000 × 732% × 214) ÷ 365 =


(18,000,000 × 732 × 214) ÷ (365 × 100) =


2,819,664,000,000 ÷ 36,500 ≈


77,251,068.493150684932 ≈


77,251,068.49

B = Amount earned:

B = P + I =


18,000,000 + 77,251,068.493150684932 =


95,251,068.493150684932 ≈


95,251,068.49

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