Percent proportion

On Monday, Sarah ran a lap around the track field in four minutes. A week later she was running the lap around the track field in 6 minutes. What is the percent of change?

• 50%

• 83%

• 33%

• 40%

Amanda increased the amount of protein she eats every day from 40 grams to 50 grams. By what percentage did Amanda increase the amount of protein she eats?

• 80%

• 10%

• 25%

• 75%

A car travel 120 miles in 3 hours. How far will it take to travel 5 hours?

• 500 miles

• 400 miles

• 300 miles

• 200 miles

At HEB 50 apples cost 25 dollars. How much will it cost to buy 60 apples?

• $ 45.00

• $ 30.00

• $ 40.00

• $35.00

Diana can type 324 words in 6 minutes. What is the constant of proportionality that relates the number of words, y, to the minutes, x?

• 34 words per minute

• 54 words per minute

• 65 words per minute

• 74 words per minute

A coat was originally priced at $50. It went on sale for $35. What was the percent of change?

• 20%

• 24%

• 40%

• 30%

A house was purchased in 2005 for $150,000. It is now valued at $135,000. What is the percent of decrease?

• 10%

• 15%

• 20%

• 5%

An employee’s hourly raise went up from $10 per hour to $12 per hour. What is the percent of increase?

• 15%

• 10%

• 20%

• 5%

Mr. David monthly salary is revised from $2500 to $2600. What percentage is the salary increased ?

• 4%

• 25%

• 6%

• 40%

The number of students in a chess club decreased from 20 to 12. Whatis the percent decrease ? Round to the nearest percent.

• 60%

• 40%

• 50%

• 45%