TRICKY PERCENTAGE CHANGES
A car rental company changed their daily rate from $48 to $60. What is the percent? Is it a increase or decrease?
25% increase
A pair of shoes originally cost $75 but is on sale for $54. What is the percent decrease?
28%
A runner improved her marathon time from 4 hours to 3.5 hours. What is the percent decrease?
12.5%
At a grocery store, 5 apples cost $4.25. Assuming the cost is proportional to the number of apples, find the constant of proportionality.
K=0.85
The price of gold increased from $1,800 per ounce to $2,250 per ounce. What is the percent increase?
25%
A TV was originally $350, but its price dropped to $273. What is the percent change? Is it an increase or decrease?
22% decrease
A concert ticket price jumped from $120 to $180. What is the percent increase?
50% INCREASE
A football team increased their average yards per game from 260 to 312. What is the percent increase?
20%
A machine fills 240 bottles of water in 6 minutes. How many bottles does the machine fill per minute?
K=40
A concert ticket originally cost $75, but due to low sales, the price dropped to $57. What is the percent decrease?
24%
The number of students in a school’s drama club changed from 56 to 77. What is the percent change? Is it a increase or decrease?
37.5% increase
A new phone was released at $999, but six months later, its price dropped to $749. What is the percent decrease?
25.03%
A cyclist increased their speed from 15 mph to 19.5 mph. What is the percent increase?
30%
A factory produces 2,400 pencils using 80 pounds of wood. Assuming the number of pencils is proportional to the weight of the wood, find the constant of proportionality.
K=30
A school had 1,250 students last year. This year, the enrollment is 1,375 students. What is the percent increase?
10%
A stadium’s attendance dropped from 85,000 to 63,750. What is the percent decrease?
25%
A grocery store raised the price of a gallon of milk from $3.29 to $4.19. What is the percent increase?
27.35%
A basketball player’s free throw percentage dropped from 92% to 78%. What is the percent decrease?
15.2%
A machine fills 240 bottles of water in 6 minutes. How many bottles does the machine fill per minute?
40
A runner's best mile time went from 6 minutes to 6 minutes and 45 seconds. What is the percent increase in time?
12.5%
A construction company’s project costs rose from $2.4 million to $3.12 million. What is the percent increase?
30%
A furniture store marked down a $2,500 couch by 35%. What is the sale price?
$1625
A weightlifter’s max squat increased from 220 lbs to 308 lbs. What is the percent increase?
40%
A printing company produces 1,350 flyers in 9 hours at a constant rate. Find the constant of proportionality and explain what it represents.
150
A stock price fell from $320 per share to $256 per share. What is the percent decrease?
20%