Calculate the due interest earned by a principal (initial amount of money lent, deposited or borrowed) of 200,000,000 units (Dollar, Euro, Pound, etc.), from date: Mar 28, 2017, to date: Mar 28, 2022, namely for a period of 1,826 days (60 Months), with an annual simple flat interest rate of 30% if the commission fee (withdrawal or payment) is 192%.

Principal (initial amount), P = 200,000,000


Annual simple interest rate, R = 30%


From date: Mar 28, 2017


To date: Mar 28, 2022


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


Commission fee (withdrawal or payment), F = 192%


No. of days in a year, N = 365


I = Simple interest:

I = (P × R × T) ÷ N =


(200,000,000 × 30% × 1,826) ÷ 365 =


(200,000,000 × 30 × 1,826) ÷ (365 × 100) =


10,956,000,000,000 ÷ 36,500 ≈


300,164,383.561643835616 ≈


300,164,383.56

B = Amount earned before deducting the
commission fee (withdrawal or payment):

B = P + I =


200,000,000 + 300,164,383.561643835616 =


500,164,383.561643835616 ≈


500,164,383.56

D = Amount earned after deducting the
commission fee (withdrawal or payment):

D = B - F =


B - F% × B =


(1 - F%) × B =


(1 - 192%) × 500,164,383.561643835616 =


- 92% × 500,164,383.561643835616 ≈


- 460,151,232.876712328767 ≈


- 460,151,232.88

Pr = Investment profit:

Pr = D - P =


- 460,151,232.876712328767 - 200,000,000 =


- 660,151,232.876712328767 ≈


- 660,151,232.88

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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