知唔知[複利息]的工式係咩呀?

A = P(1 + R/100)^n

A = amount
P = priciple(the original amount of deposit)
R = Rate
n = period

If you want to have the interest only,
I = P(1 + R/100)^n - P

2006-11-06 18:24:39 補充：
The period varies, it is the period in each year. If the question is...r% p.a., then n = 1, R = rr% half-yearly, then n = 2, R = r/2r% quarterly, then n = 4, R = r/4

compund interest (複利息)
P=principal (本金)
A=ammount (本利和)
R=interest rate (利率)
n=number of periods (時期)
formula:
A=P(1+R)^n

公式 : 以每期複利率R% , 在n 個時期後,
(1) 本利和 = 本金 x (1+ R%)n
(2) 複利息 = 本利和–本金