Ratios
A recipe calls for 4 cups of flour and 6 cups of sugar. What is the ratio of flour to sugar?
2/3
A machine produces 240 widgets in 8 minutes. How many widgets does it produce per minute?
30 widgets
What is the better buy?
12 oz box of spaghetti for $3.60
18 oz box of spaghetti for $6.30
12 oz box: $0.30
18 oz box: $0.35
The 12 oz box is the better buy
2 = 10
6 x
x = 30
Is there a proportional relationship?
3 and 9
4 12
Yes
The rate is 36
In a classroom, there are 18 girls and 12 boys. What is the ratio of girls to boys in simplest form?
3/2
A car travels 180 miles in 3 hours. How fast does the car drive per hour?
60 miles per hour
What is the better buy?
10 oz cereal box for $2.50
12 oz cereal box for $2.88
10 oz: $0.25
12 oz: $0.24
The better buy is the 12 oz
1 = 5
3 x
x = 15
Is there a proportional relationship?
4 and 8
5 10
Yes
In a fruit basket, there are 12 apples and 8 oranges. In simplest form, what is the ratio of apples to oranges?
3/2
60 words per minute
What is the better buy?
32 oz orange juice for $4.80
64 oz orange juice for $9.20
32 oz: $0.15
64 oz: $0.14
The 64 oz is the better buy
20 = 8
9 x
x = 3.6
2 and 5
3 7
No
A soccer team has 9 offensive players and 6 defensive players. What is the ratio of offensive players to the total players on the team?
3/5
Sarah purchased 12 notebooks or $18. How much did each notebook cost?
$1.50
What is the better buy?
6-pack of granola bars for $4.50
10-pack of granola bars for $7.00
12-pack of granola bars for $9.30
6-pack: $0.75
10-pack: $0.70
12-pack: $0.78
The 10-pack is the best buy
x = 6
7 21
x = 2
Is there a proportional relationship?
5 and 10
8 16
Yes
The rate is 80
In a basket, there are 20 blue marbles, 15 red marbles, and 5 green marbles. What is the ratio of blue marbles to the total marbles in the bag?
1/2
Jacob fills his car with 15 gallons of gas that costed him $52.50. How much did it cost per pound?
$3.50
Alex drives 240 miles in 6 hours.
Jamie drives 180 miles in 3 hours.
Taylor drives 300 miles in 10 hours.
Who drives the most miles per hour?
Alex: 40 mph
Jamie: 60 mph
Taylor: 30 mph
Jamie drives the fastest miles per hour
17 = x
20 25
x = 21.25
Is there a proportional relationship?
7 and 14
9 20
No