All Things Percents
If 3 pencils cost $6, how much do 5 pencils cost?
What is $10?
A map scale shows that 1 cm = 5 km. How many km are 3 cm on the map?
What is 15 km?
The original cost of a backpack is b dollars. There is a 6% sales tax. Write an expression that represents the total cost of the backpack, including tax.
What is b + .06b?
Maria buys 3 pencils at $1.50 each. She also buys a notebook for $2. How much does she spend in total?
What is $6.50?
A store sells 2 muffins for $6, 4 muffins for $12, and 6 muffins for $18. Is this rate proportional? Why or why not?
What is yes, it is proportional because the rate of muffins and money is consistent at every step?
5/8 = x/24. Solve for x.
What is x = 15?
A blueprint has a scale of 1 in = 4 ft. If a room is shown as 5 in long on the blueprint, what is the actual length?
What is 20 feet?
A T-shirt originally costs t dollars. It is on sale for 15% off. Write an expression for the sale price of the T-shirt.
What is t - .15t?
A recipe calls for 2/3 cup of sugar per cake. If Sam wants to make 3 cakes, how much sugar does he need in total?
What is 2 cups?
What is no?
Lee can run 60 feet in 15 seconds. If he runs proportionally over time, what is the rate (k) Lee runs?
What is k = 4?
Hot Wheels model cars are scaled to 1/18 the size of a real car. If a real car has a length of 12 feet, what would the model length be?
What is 2/3 of a foot?
A class of 30 students is going to a museum. Each student buys a ticket for m dollars and a snack for s dollars. Write two expressions we can use to solve.
What is 30(m + s) AND 30m + 30s?
A stack of books is 15.5 inches high. Each day, 2.3 inches of books are added. What will be the height of the stack after 6 days?
What is 29.3 inches?
A car travels 55 miles in 1 hour and 110 miles in 2 hours. What is the constant of proportionality (k)?
What is k = 55?
If there is a proportional rate of 3 boys to 4 girls in a classroom, how many girls are in a class with 21 boys?
What is 28 girls?
A map scale is 1 cm = 2.5 km. If two cities are 7.2 cm apart on the map, how far apart are they in real life?
What is 18 km?
The number of rabbits, r, is expected to decrease by 18% this year. Which equation represents the number of rabbits after the decrease?
What is .82r?
Leo started with 12 ¾ inches of sand in a container. Each day, he adds 2 ⅖ inches of sand. How tall will the sand pile be after 6 days?
What is 27 3/20 inches?
What two requirements does a graph have to have in order to be proportional?
What is it has to be a straight line and go through the origin?
A recipe uses 2 cups sugar for every 3 cups flour. How much sugar is needed for 9 cups flour?
What is 6 cups of sugar?
A map uses a scale of 1 cm = 0.75 km. A river on the map is 9.6 cm long. How long is the river in kilometers?
What is 7.2 km?
A school fundraiser sells t-shirts (t) for $12 each and water bottles (w) for $5 each. The school offers a 20% discount on the total purchase. What expression can be used to solve this problem?
What is .20(12t + 5w)?
A rental car costs $25 per day plus $0.12 per mile. If Maria rents the car for 3 days and drives 150 miles, how much does she pay?
What is $93?
A water tank fills at a constant rate. The graph of time (hours) vs. water in the tank (gallons) passes through points (0, 0) and (3, 90). If the line continues, how much water will be in the tank in 5 hours?
What is 150 gallons?