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← 2.3 Commercial Arithmetic

Depreciation by the formula

Mathematics · Grade 11 · about 40 minutes

A value that falls by a fixed percent of what remains uses P times (1 - R/100) to the power n, so later falls are smaller.

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Other lessons in this sub-strand

  1. Simple interest on a loan
  2. From the steps to a formula
  3. Compound interest for four years
  4. Compounding every half-year
  5. Appreciation by the formula
  6. Depreciation by the formula
  7. Carrying charge and its rate
  8. Building the instalment
  9. A classroom tax table
  10. PAYE and another deduction
  11. The rate on the next slice
  12. Three figures before a choice