Proportional Relationships
Ms. Walsh buys 3 pounds of cat food for $7.50.
What is the price per pound?
$2.50 per pound
Find a decrease of 15% on 2,569 ft
2,183.65 ft
, Matt flipped a coin 50 times. He predicted the coin would come up tails 25 times, but it did so only 21 times. What is the percent error in Matt's prediction?
19%
Write 25% as a decimal
0.25
A car is 180 inches long. A truck is 75% longer than the car. How long is the truck?
315 inches
Ms. Walsh buys 3 pounds of cat food for $7.50.
Write an equation relating the cost (c) for p pounds of cat food.
c=2.50p
An increase of 52% in 3,580 lb.
5,441.6 lb
Julie is preparing lemonade for her friends on a hot afternoon. She estimates 2 gallons of the beverage would suffice but ends up making 4 gallons. What is the percent error in Julie’s estimate?
50%
Write 0.05 as a percent
5%
Today, everything at a store is on sale. The store offers a 20% discount. The regular price of a T-shirt is $18. What is the discount price?
$14.40
Karlie runs 2.3 miles in 1/2 an hour. What is her speed in miles per hour?
4.6 miles per hour.
A decrease of 35% in 9,920 pt.
6,448 pt
Diego measured the length of a pen to be 22 cm. The actual length of the pen is 23 cm.
What is the percent error?
4.3%
Write 132% as a decimal
1.32
The store bought a pair of shoes for $50, and sold it for $80. What percentage was the markup?
60% markup
Priya has a recipe for banana bread. She uses 7 1/2
cups of flour to make 3 loaves of banana bread.
Which of these equations represents the relationship between b (loaves of bread) and f (cups of flour)?
b=2/9 f
b=2/5 f
b=5/2 f
b=9/2 f
b=2/5 f
The average speed of a fully loaded Boeing 747 during take off is 184 mph. Its landing speed decreases by 85% when compared to its take of speed. What is the speed of the aircraft when it lands?
27.6 mph
Robert cycled for 5 miles. He estimated his average speed to be 14 miles per hour, but it was actually 10 miles per hour. What is the percent error in Robert’s estimate?
40%
Write 0.025 as a percent
2.5%
Lin’s father is paying for a $20 meal. He has a 15%-off coupon for the meal. After the discount, a 7% sales tax is applied. What does Lin’s father pay for the meal?
$18.19
A circular running track is 1/4 mile long. Elena runs on this track, completing each lap in 1/20 of an hour.
What is Elena’s running speed? Include the unit of measure.
5 miles per hour
A supermarket receives 175 pounds of potatoes during the first week of June. The weekend supply of potatoes increases by 23%. How many pounds of potatoes does the supermarket receive on the weekend?
215.25 pounds
Adam is working on a science project. He guessed the project would take another 7 days to complete, but it actually took 8 days. What is the percent error in Adam's estimate?
12.5%
Write 3/4 as a percent
75%
Today, everything at a store is on sale. The store offers a 20% discount.
The discount price of a hat is $18. What is the regular price?
$22.50