Percent Review

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

• 5%

• 31%

• .3%

• 56%

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%

Zed went to the store and bought a bag of chips.  He estimated there would be 350 chips in the package, but realized there were only 210 chips in that package.  What was his percent error?

• 35%

• 67%

• 85%

• 92%

The students measured length during a science experiement, they got 12 cm. But the actual measurement was 14.25 cm. What was the percent error?

• 15.79%

• 18.75%

• 2.25%

• 18%

Jessie estimates the weight of her cat to be 8 pounds.  The actual weight of the cat was 10 pounds.  Find the percent error.  

• 15%

• 20%

• 25%

• 30%

An archaeologist estimated that a fossil was 520 years old. It was actually 500 years old. What was the percent error?

• 4%

• 20%

• 3.8%

• none of these

What is 5% of 20?

• 10

• 5

• 2

• 1

28 is 70% of what number?

• 35

• 40

• 50

• 55

56 is 35% of what number?

• 70

• 160

• 62.5

• 16

James took a quiz and got 15 questions out of 20 questions right what was his grade percentage?

• 75%

• 50%

• 100%

• 15%