Percent Change, Simple Interest, & Scale Factor

Find the percent of change if the original cost was $5 and the new cost is $1. 

• Increase $4
• Decrease $4
• Decrease 80%
• Decrease 400%

Tags

CCSS.7.RP.A.3

Ann works in a supermarket for $10 per hour. She received a raise to $12 per hour. What is the percent of change in her hourly wage?

• Increase 16.67%

• Decrease 16.67%

• Increase 20%

• Decrease 20%

Find the PERCENT of change from 20 dogs to 5 dogs

• Decrease 15%

• Increase 15%

• Increase 75%

• Decrease 75%

Find the percent change:

Original amount: 72

New amount: 7

• 20% increase

• 90% increase

• 10% decrease

• 90% decrease

A car dealer raised the price of a car from $10,500 to $11,000. What was the percent of change?

• 4.76% increase
• 4.54 % increase
• 4.54% decrease
• 4.76% decrease

Tags

CCSS.7.RP.A.3

Emilio borrows $1,200 from a bank with 8% simple interest per year. How much will he have to pay back total in 2 years?

• $150

• $192

• $1,350

• $1,392

Starting money = $350.
Interest rate = 2.5%
TIme = 3 years.
How much interest?

• $7.50
• $26.25
• $87.5
• $262.50

Tags

CCSS.7.RP.A.3

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

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

Tags

CCSS.7.RP.A.3

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

• Principle

• Interest

• Time, in hours

• Time, in years