Random Q's
What variable do we use for the constant of proportionality?
k
Find the constant of proportionality based on the table.
x (hours) | y (miles)
4 | 48
7 | 84
10 | 120
k = 12
50% of 36 is equal to what number?
18
If Lola makes a cake for $20, but then sells it for $30, how much is the percent markup?
50%
Shauna buys a necklace that usually costs $20 for 25% off. How much did she pay?
$15
What two conditions must a graph satisfy in order for us to label it as a proportional graph?
- Goes through the origin (0,0)
- Linear, graph is a straight line, constant slope
Lana is planting flowers in her garden and needs to know how much mulch to buy. Last time she gardened, she was able to plant 3 flowers with 12 oz of mulch. If she wants to plant 5 flowers now, how much mulch will she need?
18 is 30% of what number?
60
The OKC Aquarium received a shipment of new t-shirts which orginally cost $12 each. However, they will be sold for $15 each in the souvenir shop. What is the percent markup?
30%
You see a sweater that is usually $60 on sale for 70% off. How much is the sale price?
$42
How do we turn a percent into a decimal? Turn 36% into a decimal.
Divide by 100% or move the decimal place to the left twice. 36% = 0.36
If one pound of apples is $1.50, then how much does a 5 pound bag of apples cost?
$7.50
what is 75% of 44?
33
A computer software retailer used a markup rate of 40%. Find the selling price of a computer game that cost the retailer $25 (original price before markup).
The selling price is $35.
You are selling a video game that you initially bought for $30. You decide to reduce the selling price to $21 in hopes to increase the likelihood of having someone buy it from you. What is the markdown rate on the game?
30% off
What is our general equation of proportionality? (that we use to plug in our constant)
y = kx
James knows that 24 grams of coffee can be well-brewed with 400 milliliters of water. How much coffee can James brew with 300ml of water?
18 grams of coffee
15 is 60% of what number?
25
If a store sells pair of shoes $60 which includes in the price a 20% markup, then how much is the price without the markup?
$50
5%
Tell me the difference between 20% of $10 and 20% off of $10.
20% of $10:
The percentage is the value we are looking for here.
0.2($10) = $2
20% off of $10:
This is a markdown! The percent in the question is the percent we want taken off of the price, not the price we will end up paying, and not the price which will be our answer.
0.2($10) = $2
$10 - $2 = $8
John is at the store buying bottles of sweet tea to bring to a lunch function at work. John buys 5 bottles of tea for a total of 60 ounces of tea, represented.
Tomorrow, John needs to buy tea again for another lunch event. However, he plans to buy 8 bottles of tea for tomorrow's event instead of only 5 bottles. How many ounces of tea does John plan to buy?
96 oz of tea
84
Chef Boyardee's famous spaghetti dinneronly takes $20 to make. He marks the price up by 215% before selling it to customers. How much is the marked up price?
$43
If a Gucci belt usually costs $495 but you find one being sold for $99 on Craigslist, how much is the percent markdown?
80% off