Percent Problems
Ethan buys a video game on sale. If the video game usually costs $39.99, and it was on sale for 20% off, how much did Ethan pay? Round to the nearest cent.
$31.99
The equation y = 5.5x represents a proportional relationship. What is the constant of proportionality?
5.5
(-8)+(-4)
-12
Convert this fraction to a decimal
3/5
0.6
What is the area of this rectangle?
36 cm^2
Harry pays $3.50 sales tax on a $70 item. What is the sales tax rate?
5%
Is this graph proportional? Why or why not?
Yes; it is a straight line that starts at the origin.
7(-3)
-21
1/2+3/8
7/8
What is the area of this yard? *include correct units
165.92 m^2
Colleen buys a movie for $20 and pays 7% sales tax. Her cousin, Brad, livesin another state. Brad buys the same movie for $22 and pays 6% sales tax.
Who pays more sales tax? How much more?
Colleen pays $0.08 more sales tax than Brad.
Sarah used 2.5 cups of cheese in a dish that serves 10 people.
Arun used 1.6 cups of cheese in a dish that serves 8 people.
How much more cheese is in one serving of Sarah’s dish?
0.05 cup
6-(-3)+2
11
Convert this fraction to a decimal
7/8
0.875
What is the perimeter of this yard?
*include correct units
51.6 m
Elsie bought a video game for $85.00. If the store charges 170% of its cost for the game, how much is the store’s profit?
$50
Is this a proportional relationship? If yes, what is the constant of proportionality?
Bonus: can you write an equation for this relationship?
Bonus:
y = w + 2
(-12)-(-5)
7
-1/2+3/8
-1/8
Find the area of this rectangle
4/3 units^2
or
1 1/3 units^2
Dagne measures and finds that she can do a vertical jump that is 27.5% of her height. If Dagne can jump 13.2 inches, how tall is she?
48 inches
The water pump for a swimming pool can move 166.5 gallons of water in 3 minutes. The number of gallons, g, is proportional to the number of minutes, m, that the pump operates. Choose all the equations that represent the relationship between g and m.
m= 1/55.5g
g=55.5m
g=0.02m
g=166.5/3m
m=55.5g
m= 1/55.5g
g=55.5m
g=166.5/3m
(-7)-(-3)
-4
Convert this fraction to a decimal
-1/8
-0.125
What is the area of this rectangle?
39/8
or
4 7/8