Multiply the principal (P) by the annual* interest rate as a decimal (r) and the time in years* (t). *The time period may be expressed in months, etc.
For example, $2000 invested at 7% simple interest for 5 years: I = Prt = 2000x0.07x5 = 140x5 = $700.
A $5000 investment at an annual simple interest rate of 4.4% earned as much interest after one year as another investment in an account that earned 5.5% annual simple interest. How much was invested at 5.5%?
$2400
the interest rate is lower than on comparable investments
What is the amout of interest that will be earned on an investment of $8000 at 10% simple interest for 3 years
No. I is as described for the stated period.
Compound interest gives you more, but at a low interest rate (less than 10%), the difference is negligible.
Alright, listen up, honey. To solve simple investment problems using simple interest, you just need to multiply the principal amount by the interest rate and the time period. Add the interest to the principal, and voila, you've got your total amount. It's basic math, darling, nothing to lose sleep over.
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Compound interest is better than simple interest because it allows your investment to grow at an accelerating rate over time. While simple interest is calculated only on the initial principal, compound interest is calculated on both the principal and any accumulated interest, leading to exponential growth. This means that the longer your money is invested, the more significant the difference becomes, maximizing returns on your investment. Ultimately, compound interest enables you to earn "interest on interest," significantly enhancing your financial growth.
Compound interest earns more money than simple interest because it calculates interest on both the initial principal and the accumulated interest from previous periods. This "interest on interest" effect allows the investment to grow at an accelerating rate over time. In contrast, simple interest is calculated solely on the original principal, leading to a linear growth pattern. As a result, the longer the investment period, the more pronounced the benefits of compound interest become.
Compound interest is more advantageous for long-term investments because it allows the interest to be calculated on both the initial investment and the accumulated interest, leading to faster growth of the investment over time.
Simple interest (compounded once) Initial amount(1+interest rate) Compound Interest Initial amount(1+interest rate/number of times compounding)^number of times compounding per yr