Everyday mathematics: How to calculate percentages, VAT and…
Learn to perform essential financial calculations such as adding and subtracting percentages, calculating margins and disaggregating taxes such as VAT.
Calculating percentages is one of the most used mathematical applications in everyday life: when evaluating offers in commercial stores, calculating tips, estimating the interest on a loan, or itemizing taxes on purchase invoices.
Despite its daily use, making mistakes when adding or subtracting percentages is very common, especially when trying to apply a discount on a value that already includes VAT.
Key Financial Formulas You Should Master
- Discount Calculation:
$$\text{Final Price} = \text{Original Price} \times \left(1 - \frac{\text{Discount}}{100}\right)$$ - Breakdown of Tax (VAT):
$$\text{Tax Base} = \frac{\text{Total Price}}{1 + \frac{\text{Tax}}{100}}$$
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