Simple Interest

The rate is given as a percent (%).  Before using it in the simple interest formula, you must first convert it to a______.

• fraction
• decimal
• ratio
• dollar amount

The simple interest formula is I=Prt.  The P represents the principle.  The principle is ___________________.  

• the amount of money borrowed or deposited
• the percent interest for his year
• the amount taxed
• the amount the bank owes you for being a customer at their bank

Julie borrowed $3,500 for 3 years at 7½% simple interest rate.

How much interest is that?

• $1015.27

• $787.50

• $810

• $812.50

Ann puts $300 in a bank account earning 4% interest.  How much will she earn in interest in 1 year?

• 4
• 8
• 12
• 16

If you are calculating the simple interest and you are given the time in months, how can you find the time in years?

• Add 12 to the months
• divide the months by 12
• multiply 12 times the months
• You cannot change it to months.

The simple interest formula is I=Prt.  What does the t represent?

• Principle
• Interest
• Time, in hours
• Time, in years

What does the "I" in the interest formula stand for?

• Principal
• Interest
• Rate
• Time

John put 14,000 Euros in an account at a simple interest rate of 1% per year.  How much interest will he get after 12 years?

• 16,800 Euros
• 168,000 Euros
• 1,680 Euros

What does the "r" in the interest formula stand for?

• Principal
• Interest
• rate
• time

Anna invested $2,500 at an annual rate of 5%.  How long will it take until Anna earns $1,125 in interest?

• 5 years
• 8 years
• 10 years
• 9 years