Rule of 72

Rarity: Common

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Notion

Domain

Science and technology

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What Wikipedia says

In finance, the rule of 72, the rule of 70 and the rule of 69.3 are methods for estimating an investment's doubling time. The rule number (e.g., 72) is divided by the interest percentage per period (usually years) to obtain the approximate number of periods required for doubling.

Excerpt from the Wikipedia article “Rule of 72”, under the CC BY-SA 4.0 license. Read the article on Wikipedia