Compound Interest/复利
In the last learning activity, we invested $1,000,000 in a simple interest account. With simple interest, we get the interest only on the initial principal. The more common practice is to calculate interest on the total amount we have in our account at the time the interest is calculated. After the first time period, we will get the interest on our interest.
Let's look at the investment of $1000 at 2%/a simple interest and 2%/a compounded annually for three years:
在上一次学习活动中，我们向一个利息账户投资了1000000美元。对于单利息，我们只得到初始本金的利息。更常见的做法是计算利息时，我们在账户中的总金额的利息。在第一个时期之后，我们将从我们的利息中获得利息。
让我们看看1000美元的投资，按2%/年单利和2%/年复利计算，为期三年：
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