Ratios
Ratios Take 2
Proportions
Percents
Converting
100
A comparison between two quantities or numbers is a _____.
Ratio
100
If there are 2 teachers in a class and 15 students, what is the ratio of students to teachers? (Write as ____:_____).
15:2
100
A proportion is a statement that shows to ratios are _____.
equal
100
A percent is ALWAYS out of __________.
100
100
Convert 36% to a fraction.
36 / 100
200
If there are 10 students in a class and 4 of them are girls, what is the ratio of total students to girls? (Write your answer with a colon, like ____ : ____)
10:4
200
If a 12 oz. bottle of shampoo costs $3.99, what is the price per unit?
$.33 per oz.
200
1/3 and 7 /21 Is this a proportion? (It may help to write them like fractions usually look - this program would not let me put in a fraction.)
YES!! If you cross multiply you get 21 and 21. Or, if you write them in a table, the pattern is to divide the bottom number by 3 to get the top.
200
What is 70% of 30?
21
200
Write 40/100 as a percent.
40%
300
If you have 20 jellybeans and 3 are black, what is the ratio of NON-black jelly beans to the total number of jellybeans? (Write your answer with ___ "to" ___).
17 to 20
300
Fill in the table: If 3 shirts cost $54, how much would one shirt cost?
$18 (pattern is to divide by 3)
300
2/6 and 3/10 Are these a proportion? (It will help to write them like fractions usually look - this program would not let me put in a fraction.)
NO!! Cross multiplying gives you 20 and 18, which are not equal.
300
What is 20% of 80?
16
300
Write .51 as a percent.
51%
400
A pet store sells dogs and cats. If there are 3 dogs in a pet store and 7 cats, what is the ratio of cats to the total number of animals. Write your ratio as a fraction.
7/10
400
If a cookie recipe calls for 6 cups of flour and you want to make HALF of a recipe, how much flour do you need?
3 cups (pattern is divide by 2)
400
Find the ? to make this true: ? / 8 = 1 / 4
2 (the pattern is to divide the bottom by 4)
400
90% of the class wants to play Jeopardy. If there are 20 students in the class, how many want to play Jeopardy?
18
400
Convert 90% to a decimal.
.9
500
A doughnut shop has 20 regular doughnuts, 15 chocolate ones, and 25 with chocolate glaze and sprinkles. What is the ratio of regular doughnuts to the total number of doughnuts in this shop? Write it as ____ to _____.
20 to 60
500
If you need 2/3 of a cup of sugar to make muffins, and you want to DOUBLE the recipe, how much sugar do you need? (Use your calculator to help!)
4/3 cups (pattern is to multiply by 2)
500
Solve for the ? in this proportion. 4/16 = 3/?
12 (the pattern is that the bottom is 4 times the top)
500
What percent is 30 out of 150?
20%
500
Write 62/100 as a percent.
62%
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