EMAILBY
ADDRESS: melulekishabalala@gmail.com
MR M. SHABALALA CELLPHONE NUMBER: 0733318802
@NOMBUSO HIGH Page 1
, FINANCE AND
GROWTH
GRADE 12
CONCEPTS TO BE COVERED
1. SIMPLE AND COMPOUND INTEREST
2. GR11 COMPOUNDING PERIODS
3. GR11 GROWTH (APPRECIATION) AND DECAY
(DEPRECIATION)
4. TIME LINE
5. GR11 NOMINAL AND EFFECTIVE INTEREST RATES
6. NEW ANNUITIES( FUTURE VALUE AND PRESENT
VALUE(LOAN))
7. NEW SINKING FUND = APPRECIATION – DEPRECIATION
8. NEW COMPARISON OF BEST LOAN AND INVESTMENT
OPTIONS.
BY MR M. SHABALALA @NOMBUSO HIGH Page 2
, FINANCIAL MATHEMATICS
GRADE 11 SUMMARY NOTES
1. SIMPLE AND COMPOUND INTEREST
CALCULATE A, P AND I
SIMPLE INTEREST – It is where by the interest is calculated on the total amount
invested or borrowed, and is not added onto the principal amount. Interest does not generate
another interest.
M ing L i t
A Futuve value/ accumulated amount/ final amount
P Principal amount/ initial amount/ starting amount
i Interest rate (written as decimal i g)
Period (usually years)
COMPOUND INTEREST- Allow interest to be earned on interest. Compound
interest is advantageous for investing money but not for taking out a loan.
M ing L it
NB! In Compound interest calculation now calculate use log in grade 12
2. COMPOUNDING PERIODS
In grade 10 we only calculated amount invested where interest earned once a year. NOW
it is possible to earn interest anytime so if interest is not earned once a year, in Formula
we need to adjust i and to match with given compounding period
NB! Semi-annually/ halfyearly, monthly, and quarterly must be known for exam
BY MR M. SHABALALA @NOMBUSO HIGH Page 3
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