Kaihui's answer to Abi's Secondary 1 Maths Singapore question.

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Kaihui
Kaihui's answer
1 answers (Tutor Details)
1st
Simple interest is the amount increased.
For example if you invested $500 and your amount you have in your bank is $550 at the end.
Your simple interest is $50

PRT/100 = Simple Interest
P= Principle Amount (Amount invested)
That’s why total amount at the end =
P + PRT/100
For example
$550 = (500)RT/100 + 500

*$500 which is your P*