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Simple and compound interest, present and future value, effective interest rates and annuities.
Watch the full lesson before attempting practice questions.
Master these ideas before attempting exam questions.
Interest calculated only on the principal each period. A = P(1 + in).
Interest calculated on principal plus accumulated interest. A = P(1 + i)ⁿ.
Convert nominal rate to effective rate: ieff = (1 + i/m)ᵐ − 1.
Future value: what you will have. Present value: what you need now to reach that future amount.
Regular equal payments. Future value annuity: Fv = x[(1+i)ⁿ−1]/i. Present value: Pv = x[1−(1+i)⁻ⁿ]/i.
Commit these to memory — they appear in almost every exam.
These are your learning targets for Finance, Growth & Decay.
Avoid these errors — they cost marks every year.
Always divide the percentage by 100 before substituting into any formula.
Identify the period unit (months vs. years). Ensure n and i use the same time unit.
Read the question carefully: are you finding what you'll have or what you need now?
Request CAPS-aligned study materials for Finance, Growth & Decay.
Comprehensive CAPS-aligned notes covering all key concepts, theorems, and worked examples for Finance, Growth & Decay.
NSC-style exam questions with full memorandum. Ideal for timed practice and self-assessment before exams.
Graded practice questions organised by difficulty. Perfect for building confidence before Paper 1.
Straight answers to common Grade 12 CAPS questions about Finance and Growth.
Finance in Grade 12 CAPS covers simple interest, compound interest, depreciation, annuities, and repayment calculations. It helps you apply maths to real-life money situations.
Start by identifying which formula the question needs, then substitute values carefully and keep track of time periods. Practising calculator work and interpreting financial wording makes a big difference.
Common mistakes include using the wrong interest formula, mixing monthly and yearly rates, and rounding too early. Learners also lose marks when they do not read whether the question is about growth or decay.
CAPS exams often test compound growth, depreciation, annuities, and loan repayments in practical contexts. These questions are common in Paper 1 and usually reward correct setup and calculator accuracy.
Book a focused session with Chris Khomo and work through this topic step by step — at your own pace, online, from anywhere in South Africa.