#### Principal (initial amount), P = 100,000

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

#### From date: Jan 21, 2019

#### To date: Feb 20, 2020

#### Duration, T = 395 days (13 Months without 1 Days)

#### Commission fee (withdrawal or payment), F = 0%

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

## I = Simple interest:

#### I = (P × R × T) ÷ N =

#### (100,000 × 20% × 395) ÷ 365 =

#### (100,000 × 20 × 395) ÷ (365 × 100) =

#### 790,000,000 ÷ 36,500 ≈

#### 21,643.835616438356 ≈

#### 21,643.84

## B = Amount earned:

#### B = P + I =

#### 100,000 + 21,643.835616438356 =

#### 121,643.835616438356 ≈

#### 121,643.84