#### Principal (initial amount), P = 500

#### Annual simple interest rate, R = 10%

#### From date: Aug 30, 2018

#### To date: Sep 10, 2018

#### Duration, T = 11 days

#### Commission fee (withdrawal or payment), F = 5%

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

## I = Simple interest:

#### I = (P × R × T) ÷ N =

#### (500 × 10% × 11) ÷ 365 =

#### (500 × 10 × 11) ÷ (365 × 100) =

#### 55,000 ÷ 36,500 ≈

#### 1.506849315068 ≈

#### 1.51

## B = Amount earned before deducting the

commission fee (withdrawal or payment):

#### B = P + I =

#### 500 + 1.506849315068 =

#### 501.506849315068 ≈

#### 501.51

## D = Amount earned after deducting the

commission fee (withdrawal or payment):

#### D = B - F =

#### B - F% × B =

#### (1 - F%) × B =

#### (1 - 5%) × 501.506849315068 =

#### 95% × 501.506849315068 ≈

#### 476.431506849315 ≈

#### 476.43

## Pr = Investment profit:

#### Pr = D - P =

#### 476.431506849315 - 500 =

#### - 23.568493150685 ≈

#### - 23.57