Percent Change Equations

Which equations represent a percent increase?

• x+.25x

• 1.25x

• .75x

• x-.25x

Which equations represent a percent decrease?

• x+.25x

• 1.25x

• .75x

• x-.25x

The original price of a bicycle was $425. Now it's on sale for $375. What percentage of the original price was the markdown?

• 113%

• 88.23%

• 11.76%

• 20%

Old Navy is having a sale for 30% off your total purchase. Deanna wants to calculate her total....Choose all that apply

• 1-.30

• x-.30x

• x-.30

• .70x

Find the percent change.
Original amount:  16
New amount: 11

• 5%

• 31%

• 0.3%

• 56%

Last year, 2,376 people attended a summer music festival. This year, attendance was 2,950. What was the percent of change in attendance to the nearest whole percent?

• Increase 24%

• Increase 19%

• Decrease 24%

• Decrease 19%

What is the percent change when a quantity increases from 100 to 150?

• 25%

• 50%

• 75%

• 100%

Calculate the percent change from 50 to 75.

• 25%

• 50%

• 75%

• 100%

The value of a new iphone is $550, but after a year or two of use the value drops to $300. What is the percent change in the value of an iPhone?

When finding percent change you must first (a)   ​ the new number from the ​ (b)   ​ number to find the amount of change.

• subtract

• original

• add

• percent