Calculate the due interest earned by a principal (initial amount of money lent, deposited or borrowed) of 1 units (Dollar, Euro, Pound, etc.), from date: Jun 24, 418, to date: Jul 24, 2018, namely for a period of 584,418 days (19,201 Months), with an annual simple flat interest rate of 2% if the commission fee (withdrawal) is 108%.

Principal (initial amount), P = 1


Annual simple interest rate, R = 2%


From date: Jun 24, 418


To date: Jul 24, 2018


Duration, T = 584,418 days (19,201 Months)


Commission fee (withdrawal), F = 108%


No. of days in a year, N = 365


I = Simple interest:

I = (P × R × T) ÷ N =


(1 × 2% × 584,418) ÷ 365 =


(1 × 2 × 584,418) ÷ (365 × 100) =


1,168,836 ÷ 36,500 =


32.022904109589 ≈


32.02

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

B = P + I =


1 + 32.022904109589 =


33.022904109589 ≈


33.02

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

D = B - F =


B - F% × B =


(1 - F%) × B =


(1 - 108%) × 33.022904109589 =


- 8% × 33.022904109589 ≈


- 2.641832328767 ≈


- 2.64

Pr = Investment profit:

Pr = D - P =


- 2.641832328767 - 1 =


- 3.641832328767 ≈


- 3.64

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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