# Formulae Usage On Simple And Compound Interest

We have discussed about Simple And Compound Interest using 2 case studies previously based on concepts understanding. Now we have introduced formulaes which will make your calculation faster and easier :)

To find the Total Amount based on Simple Interest, this is the formuale you can use:
$A_n=P(1+\frac{r}{100}n)$

An : Total Amount after n years

P: Original Principal Amount

r: Simple Interest Rate

n: Number of Years

To find the Total Amount based on Compound Interest, this is the formuale you can use:
$A_n=P(1+\frac{r}{100})^n
$

An : Total Amount after n years

P: Original Principal Amount

r: Compound Interest Rate

n: Number of Years

Apply these formulaes to the case studies we have discussed, did you get the same answer?

Congrats!Now you have 2 different approaches, the formulae way or the conventional way to solve all Interest questions.

Keep using the strategies learnt so that you get better and better.

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### Ai Ling Ong

Hi, I'm Ai Ling Ong. I enjoy coaching students who have challenges with understanding and scoring in 'O' Level A-Maths and E-Maths. I develop Math strategies, sometimes ridiculous ideas to help students in understanding abstract concepts the fast and memorable way. I write this blog to share with you the stuff I teach in my class, the common mistakes my students made, the 'way' to think, analyze... If you have found this blog post useful, please share it with your friends. I will really appreciate it! :)

### 4 Responses to Formulae Usage On Simple And Compound Interest

1. [...] out the next post on Formulae Usage on Simple And Compound Interest  which will reduce your time to reach your correct answer. Next in seriesRelated Content for [...]

2. josiah says:

excellent