Percent Error, Percent of Change, Simple Interest

One week, 72 people got a speeding ticket. The next week, only 36 people got a speeding ticket. What is the percent of change in the speeding tickets?

• Increase 50%

• Decrease 50%

• Increase 1%

• Decrease 1%

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

Emilio borrows $1200 from a bank with 8% simple interest per year.  How much will he have to pay back total in 2 years?

• $150

• $192

• $1350

• $1392

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

• 95

• 105

• 125

• 135

The percent of change is the percent a quantity increases or __________ from its ________ value

• original, decreases

• multiplies, adds

• divides, subtracts

• decreases, original

A percent error is how _________ a measurement is compared to the correct measurement

• inaccurate/wrong

• accurate/right

• percent

• increase

What is the definition of percent increase?

• The percent change where something gains value or increases

• The percent change where something loses value or decreases

• It is a percent

• The subtraction of percents

What is a rate?

• The adding of interest charged or paid

• The percent of interest charged or paid

• The subtracting of interest charged or paid

Sales tax rate is the ________of an amount that is added to the cost of an item

• percent

• principal

• interest

Simple interest is interest on the ___________principal amount (that you invested)

• rate

• percent

• original