Simple Interest and Percentages

What number is 150% of 40?

• 60

• 190

• 20

• 90

90 is 18% of what number?

• 500

• 50

• 5

• 0.5

Jenna borrowed $5,000 for 3 years and had to pay $1,350 simple interest at the end of that time. What rate of interest did she pay?

• 6%

• 6%

• 8%

• 9%

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

• Principle

• Interest

• Time, in hours

• Time, in years

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

Jack deposited $1,400 in his bank account.  After 3 years, the account earned $294 in interest.  Find the simple interest rate.

• 5%

• 8%

• 7.25%

• 7%

Write 0.2% as a decimal. 

• 20.0

• 2.0

• 0.02

• 0.002

You open a bank account with $2500. You earn 1.5% interest per year. You have the account for 2 years. How much interest do you earn?

What is 25% of 2 hours?

• 45 minutes

• 30 minutes

• 0.3 hours

• 0.5 minutes

A St. Louis Cardinals hat costs $18.  If there is 8% sales tax, what is the total cost of the hat including tax?

• $1.44

• $22.74

• $21.36

• $19.44