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Calculating Simple & Compound InterestPowerPoint Presentation

Calculating Simple & Compound Interest

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## PowerPoint Slideshow about ' Calculating Simple & Compound Interest' - simone

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Simple Interest

Simple interest (represented as I in the equation) is determined by multiplying the interest rate by the principal by the number of periods. (Same amount every year)

Simple Interest equation: I = Prt

Principal sum (P)- The initial amount of money invested or borrowed (ie. $10, 000)

Interest rate (r)- The amount charged or given to the principal sum (ie. 5%)

Interest period (t)- The number of years you plan to invest or borrow (ie. 5 years)

Let’s try it

Tim, a grade 9 student at Preston High school received $1000 from his grandma for his birthday. After learning about savings in his BBI class, he decides to go to his bank and put the money into a savings account at an interest rate of 3% annually until he goes to university in 4 years.

Calculate the simple interesting using the simple interest equation: I=Prt

I = Prt

- P = $1000
- r= 3% annually
- t= 4 years
I = 1000 x 0.03 x 4

= 120

Therefore Tim will have made $120 in interest over the 4 years resulting in a total of $1120.

Compound Interest

- Interest calculated on the amount saved or borrowed plus any interest already accumulated

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