Simple Interest, Percent Change, Percent Error

Last week, you finished level 2 of a video game in 32 minutes. Today, you finished level 2 in 28 minutes. What is your percent of change?

• Increase 12.5%

• Decrease 12.5%

• Increase 4%

• Decrease 4%

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

• Principle

• Interest

• Time, in hours

• Time, in years

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

Principal = $500
Interest rate =5%
Time = 5 years
What is the interest earned?

• 95

• 105

• 125

• 135

Christian opened a savings account with $3250. His account will earn 5.2% simple interest. How much money will be in his account after 6 years?

• $4,264.00

• $1,104.00

• $1,100.00

• $4,400.00

Alexis opened an account with $35. The account she opened earns simple interest at a rate of 8.6%. How much money will her account have in 4 years?

• $47.04

• $35.04

• $45.00

• $37.45

Dan borrowed $2,000 for 6 months at 12% annual simple interest rate. How much interest is that?

• $120

• $144

• $1,200

• $1,440

Mrs. Ciampa had 27 students in her class last year and this year she had 30 students in her math class. What is the percent of change?

• 24%

• 20%

• 11%

• 50%

Find the percent increase. Round to the nearest percent.
From $5 to $8 

• 40%

• 60%

• 55%

• 65%

The number of people signed up for a bus trip increased from 32 to 45. What is the percent increase? Round to the nearest percent.

• 52%

• 41%

• 42%

• 45%