Ratio and Rates
Proportions
Percents, Decimals, Fractions
Percent of a number
Solving Percent Problems
100
Flowers in a Bouquet Roses 5 Daffodils 7 Orchids 4 Daffodils to Orchids
What is 7:4, 7 to 4, 7/4
100
o o o o x x x x x x Find the proportion
What is 4:6=2:3
100
Write the decimal 0.2 as a percent.
What is 20%
100
Identify 55% of 160.
What is 88
100
Solve. What percentage of 170 is 51?
What is 30%
200
Gina’s CD Collection Music 5 Games 8 Cartoons 12 Ratio of Game CDs to total CDs
What is 8:25, 8 to 25, 8/25
200
Solve. 4/5 = 36/y
What is y=45
200
Write the fraction 12/50 as a percent.
What is 24%
200
Identify 140% of 85
What is 119
200
128% of what number is 96?
What is 75
300
Total number of students to number of students with average math skill. Math Skill of Students in Class Excellent 8 Good 13 Average 9
What is 30:9, 30 to 9, 30/9
300
Solve. m/66 = 4/11
What is m=24
300
Write 11/16 as a percent.
What is 68.75%.
300
Identify 0.6% of 130.
What is .78
300
What percent of 1,520 is 15.2
What is 1%
400
Jeff sells a pack of 36 pencils for $3.25. Betsy sells a pack of 12 pencils for $1.50. Which is the better buy?
What is 36 pencils (Jeff's buy)
400
According to the label, 1 tablespoon of mixed fruit concentrate should be used to prepare 200 ml of juice. How many tablespoons of concentrate would you use to prepare 800 ml of juice?
What is 4 tablespoons
400
About 1/8 of the students of Jennifer's class walk to school. What percent of the students walk to school?
What is 12.5%
400
A school has 250 students. If 56% of the students went on a hiking trip, how many students went on a hiking trip?
What is 140 students
400
A jeweler has a pendant on sale for $150. If the total cost of the pendant is $160.50, what is the sales tax?
What is 7%
500
A 12-ounce bag of birdseed costs $3.12. A 16-ounce bag of birdseed costs $3.84. Which is the better deal? How much money per ounce would you save by buying that size bag instead of the other?
What is the 16-ounce bag; I would save $0.02 per ounce.
500
To avoid dehydration, a person should drink 8 ounces of water for every 15 minutes of exercise. How much water should Hahn drink if he cycles for 135 minutes?
What is 72 ounces.
500
Your teacher has offered you a choice for your 50 homework problems. You can do 48% of the problems, all of the even-numbered problems, or 35 of the problems. Which option will you choose? How many problems will you have to do for homework?
What is 48% or 24 problems.
500
In 2004, there were 10,649 commercial radio stations in the United States. About 19.22% of those stations were devoted to country music. About how many country music radio stations were there in 2004?
What is about 2,047 radio stations
500
Jed buys a sweater that has a sale price of $48. Jed gives the sales clerk $60 and receives $7.80 in change. What is the sales tax rate?
What is 8.75%
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