Rule of 72
Pia inajulikana kama: Doubling Time Rule
t \approx \frac{72}{r}
t ≈ 72 / rInahesabu Nini
A quick mental math shortcut to estimate how many years it takes for an investment to double at a given annual rate of return.
vigezo
| Alama | Jina | Maelezo |
|---|---|---|
| t | Doubling Time | Approximate years for an investment to double |
| r | Annual Rate | Annual interest rate as a percentage (not decimal) |
Mifano Iliyofanya Kazi
1
t = 72 / 8 = 9 yearsMatokeo: ~9 years
Jaribu Kikokotoo
Fomula Zinazohusiana
#mental math#investing#doubling