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How to calculate percentage of a number?
To calculate percentage of a number use the formula: (Percentage × Number) ÷ 100. For example, 25% of 1000 = (25 × 1000) ÷ 100 = 250. This is the most common type of calculation for discounts, taxes and commissions. How to find a number by percentage?
If it is known that a certain value represents X percent, the original number is found by the formula: (Value × 100) ÷ Percentage. For example, if 250 is 25%, then the full number = (250 × 100) ÷ 25 = 1000. What is percentage change and how to calculate it?
Percentage change shows by what percentage the value has changed. Formula: ((New Value - Old Value) ÷ Old Value) × 100. Can be positive (increase) or negative (decrease). What is the difference between simple and compound interest?
Simple interest is calculated only on the principal amount. Compound interest is calculated on the amount together with previously accrued interest. For investments and deposits, compound interest is usually used. How to correctly calculate discount in a store?
To calculate discount: Discount Amount = (Discount Percentage × Original Price) ÷ 100. Final Price = Original Price - Discount Amount. For example, 15% discount on item for $2000 = $300, final price = $1700. What are percentage points?
Percentage points are the absolute difference between two percentage values. For example, if the rate increased from 5% to 7%, this is an increase of 2 percentage points, but 40% in relative terms. How to calculate VAT?
VAT rates vary by country (typically 15-25%). To calculate VAT from amount without VAT: VAT = Amount × Rate ÷ 100. To extract VAT from amount with VAT: VAT = Amount × Rate ÷ (100 + Rate). Amount without VAT = Amount with VAT × 100 ÷ (100 + Rate). How does compound interest work when investing?
Compound interest allows you to earn interest on interest. Formula: Final Amount = Principal × (1 + annual rate)^number of years. The longer the investment period, the greater the effect of compound interest. (责任编辑：) |