#### Principal (initial amount), P = 300

#### Annual simple interest rate, R = 20%

#### From date: Jun 5, 2017

#### To date: Jun 13, 2017

#### Duration, T = 8 days

#### Commission fee (withdrawal or payment), F = 2%

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

## I = Simple interest:

#### I = (P × R × T) ÷ N =

#### (300 × 20% × 8) ÷ 365 =

#### (300 × 20 × 8) ÷ (365 × 100) =

#### 48,000 ÷ 36,500 ≈

#### 1.315068493151 ≈

#### 1.32

## B = Amount earned before deducting the

commission fee (withdrawal or payment):

#### B = P + I =

#### 300 + 1.315068493151 =

#### 301.315068493151 ≈

#### 301.32

## D = Amount earned after deducting the

commission fee (withdrawal or payment):

#### D = B - F =

#### B - F% × B =

#### (1 - F%) × B =

#### (1 - 2%) × 301.315068493151 =

#### 98% × 301.315068493151 ≈

#### 295.288767123288 ≈

#### 295.29

## Pr = Investment profit:

#### Pr = D - P =

#### 295.288767123288 - 300 =

#### - 4.711232876712 ≈

#### - 4.71