Rule of 72
A way to estimate how long it takes to double the value of an investment.
You divide 72 by the interest rate to get the number of years.
Examples:
• For an annual rate of 8%, divide 72 by 8, for a result of 9 years. So at 8% it takes about 9 years to double your money.
• For an annual rate of 10%, divide 72 by 10, for a result of 7.2 years. So at 10% it takes about 7 years to double your money.
But it is only an estimate, and there are more exact formulas.
- decahedron
- deci-
- decimal
- decimal fraction
- decimal number
- decimal number system
- decimal point
- decompose
- decrease
- deduct
- deductible
- definite integral
- degree (accuracy)
- degree (algebra)
- degree (angles)
- degree (temperature)
- denominator
- density
- dependent event
- dependent variable
- deposit
- depth
- derivative
- descending order
- determinant