#### Principal (initial amount), P = 866

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

#### From date: Mar 25, 2017

#### To date: Apr 25, 2017

#### Duration, T = 31 days

#### Commission fee (withdrawal or payment), F = 3%

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

## I = Simple interest:

#### I = (P × R × T) ÷ N =

#### (866 × 3% × 31) ÷ 365 =

#### (866 × 3 × 31) ÷ (365 × 100) =

#### 80,538 ÷ 36,500 ≈

#### 2.206520547945 ≈

#### 2.21

## B = Amount earned before deducting the

commission fee (withdrawal or payment):

#### B = P + I =

#### 866 + 2.206520547945 =

#### 868.206520547945 ≈

#### 868.21

## D = Amount earned after deducting the

commission fee (withdrawal or payment):

#### D = B - F =

#### B - F% × B =

#### (1 - F%) × B =

#### (1 - 3%) × 868.206520547945 =

#### 97% × 868.206520547945 ≈

#### 842.160324931507 ≈

#### 842.16

## Pr = Investment profit:

#### Pr = D - P =

#### 842.160324931507 - 866 =

#### - 23.839675068493 ≈

#### - 23.84