#### Principal (initial amount), P = 100

#### Annual simple interest rate, R = 3%

#### From date: May 3, 2017

#### To date: Jun 3, 2017

#### Duration, T = 31 days

#### Commission fee (withdrawal or payment), F = 802%

#### No. of days in a year, N = 365

## I = Simple interest:

#### I = (P × R × T) ÷ N =

#### (100 × 3% × 31) ÷ 365 =

#### (100 × 3 × 31) ÷ (365 × 100) =

#### 9,300 ÷ 36,500 ≈

#### 0.254794520548 ≈

#### 0.25

## B = Amount earned before deducting the

commission fee (withdrawal or payment):

#### B = P + I =

#### 100 + 0.254794520548 =

#### 100.254794520548 ≈

#### 100.25

## D = Amount earned after deducting the

commission fee (withdrawal or payment):

#### D = B - F =

#### B - F% × B =

#### (1 - F%) × B =

#### (1 - 802%) × 100.254794520548 =

#### - 702% × 100.254794520548 ≈

#### - 703.788657534247 ≈

#### - 703.79

## Pr = Investment profit:

#### Pr = D - P =

#### - 703.788657534247 - 100 =

#### - 803.788657534247 ≈

#### - 803.79