Ratios
Write the ratio as a fraction in simplest form:
18 red buttons: 12 blue buttons
3/2
Tell whether the two rates form a proportion
1/8 and 4/32
yes
Use the table to write a proportion
Monday Tuesday
Dollars 42 56
Hours 6 h
$42/$56 = 6/h
or
$42/6 = $56/h
Write the ratio as a fraction in simplest form:
5/4 inches to 2/3 inch
15/8
2/3 and 10/30
Use the table to write a proportion
Series 1 Series 2
Games g 6
Wins 4 3
g/6 = 4/3
or
6/4 = 6/3
Use the ratio table to find the unit rate with the specified units:
Cost per song
2 songs-$1.98, 4 songs-$3.96, 6 songs- $5.94
$0.99 per song
Tell whether the two rates form a proportion
75 miles in 3 hours; 140 miles in 4 hours
no
Write a proportion to find how many points a student needs to score on the test to get the given score
Test worth 90 points; test score of 60%
60/100 = x/90
Find the unit rate with the specified units
Gallons per hour
3 hours- 10.5 gallons, 6 hours- 21 gallons, 9 hours- 31.5 gallons
3.5 gallons per hour
Tell whether the two rates form a proportion
150 steps in 50 feet; 72 steps in 24 feet
yes
The swim team has 80 swimmers. The ratio of sevneth-grade swimmers to all swimmers is 5:16. Write a proportion that gives the number s of seventh-grade swimmers.
5 seventh-grade swimmers/16 swimmers = s seventh-grade swimmers/16 swimmers
The amount of time needed to download music is shown in the table. Find the unit rate in megabytes per second.
6 seconds- 2 megabytes, 12 seconds- megabytes, 18 seconds- 6 megabytes
1/3 MB per second
You advance 3 levels in 15 minutes. Your friend advances 5 levels in 20 minutes. Do these rates form a proportion? Explain
No, your rate is 5 min/level and your friend's rate is 4 min/level
*Double points 1,000
You spend 150 minutes in 3 classes. Write and solve a proportion to find how many minutes you spend in 5 classes.
150 min/3 classes = x minutes/5 classes
250 minutes