Personal Finance Math
Presentation
•
Specialty
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10th - 12th Grade
•
Practice Problem
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Medium
Brittany Catalano
Used 49+ times
FREE Resource
8 Slides • 8 Questions
1
2
https://www.cnbc.com/video/2019/05/17/compound-interest-how-it-works-and-how-to-calculate-it.html
Compound: Interest earns more interest
Simple: Only original amount earns interest
3
Only amount invested is charged / earns interest
This is ONLY the interest that you earned.
To see total amount paid back need to add Principal back in
A=P+(P*R*T)
4
Multiple Choice
You invest $100. You earn 5% for 2 years. How much interest have you earned?
$5
$10
$10.25
$110
5
Multiple Choice
You invest $200 for 2 years earning 5% in a bond. What is the total amount you will get paid back when it reaches maturity.
$20
$20.50
$220
$220.50
6
Is the interest on a loan or deposit calculated based on both the initial principal and the accumulated interest from previous periods
Will often just look up a calculator: https://www.investor.gov/financial-tools-calculators/calculators/compound-interest-calculator
7
Please remember your order of operations
May be easiest if you
1. Figure out your periodic rate or the rate charged per period
This is i/n
2. Add in the 1
3. Do the exponent (already have n*t calculated)
4. Times the principle
8
We will NOT do this - even our easier formula you can use an online calulator, but should understand the parts
9
10
Multiple Choice
If my investment compounds monthly n would equal
2
4
12
365
11
Multiple Choice
If I am earning 12% and my investment compounds quarterly what would my periodic rate be (rate charged per period or i/n)
12%
4%
3%
1%
12
Multiple Choice
If my investment compounds semi-annually and I leave it for 4 years, how many times would it compound?
2
4
8
Cannot tell
13
Multiple Choice
If I invested$100 in an account that compounds annually, earns 2%, and I left it for 5 years what would the formula look like
100*.02*5
100(1+.2/1)^(5*1)
100(1+.02/1)^(5*1)
100(1+.02/5)^(5*1)
14
Multiple Choice
Same information from last slide: If I invested $100 in an account that compounds annually, earns 2%, and I left it for 5 years what would I end up with? Formula: P(1+i/n)^(nt)
$100
$110
$110.41
Cannot tell
15
Multiple Choice
If I invested $100 in an account that earns 12%, compounding monthly and I left it for 30 years what would I end up with? Formula: P(1+i/n)^(nt)
360
460
3,594.96
35,94.96
16
Watch something like:
https://www.youtube.com/watch?v=OQ9Mv2jwQWo
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