App Detail » Math Video: Simple Interest & Compound Interest

What's New

Updated the app to support iPhone 5's new screen size.

Fixed the issue where the video screen is not displayed properly for iPad with iOS 6.

App Description

This math video app provides a quick and simple way for you to learn and understand the basics for simple interest and compound interest. All of the 10 computer animated videos are stored in your device. So, no internet connection is required to play. These math videos are: Simple Interest Formula, Maturity Value Formula, Simple Interest: Example 1, Simple Interest: Example 2, Simple Interest: Example 3, Compound Interest Formula 1, Compound Interest Formula 2, Compound Interest: Example 1, Compound Interest: Example 2 & Compound Interest: Example 3.

Each of these videos is divided into several different parts that you can easily skipped to. More details below:

Simple Interest Formula
•Introduction
•Calculating simple interest without the formula
•Calculate the yearly interest
•Deriving the simple interest formula
•Deriving the simple interest formula continued...

Maturity Value Formula
•Introduction
•Understanding the maturity value formula
•Explaining the derivation of maturity value formula
•Deriving the maturity value formula
•Factorizing the maturity value formula

Simple Interest: Example 1
•Introduction
•Calculate the simple interest when P, r & t (year) are given
•Substitute P and r of the formula with the given values.
•Converting the interest rate 3% into a decimal
•Substitute t with the given value and calculate the result.

Simple Interest: Example 2
•Introduction
•Calculate the simple interest when P, r & t (month) are given
•Substitute P and r & convert the value of r to decimal
•Substitute t with the given value & convert month to year
•Simplify and calculate the simple interest

Simple Interest: Example 3
•Introduction
•Calculate the loan interest rate when I, P & t are given
•Substitute I, P and t with the given values & simplify
•Calculate for the interest rate, r
•Convert the interest rate from decimal to percent

Compound Interest Formula 1
•Introduction
•Example: Understanding compound interest
•The amount needed to pay back after the 1st year
•The amount needed to pay back after the 2nd year
•The amount needed to pay back after the 3rd year

Compound Interest Formula 2
•Introduction
•Deriving the compound interest formula
•The amount needed to pay back after the 1st year
•The amount needed to pay back after the 2nd & 3rd year
•The compound interest formula: A=P(1+r)^n

Compound Interest: Example 1
•Introduction
•Calculate the compound interest when P, r & n are given
•Substituting P, r and n into the compound interest formula
•Convert the interest, 20% into a decimal
•Calculate the total amount, A

Compound Interest: Example 2
•Introduction
•Calculate the principal, P when A, r & n are given
•Substituting A, r and n into the compound interest formula
•Convert the interest, 10% into a decimal
•Calculating the principal, P

Compound Interest: Example 3
•Introduction
•Calculate the interest, r when A, P & n are given
•Substituting A, P and n into the compound interest formula
•Solve the equation to find the interest, r
•Convert the interest, r from decimal to percent

App Changes

• June 10, 2014 Initial release