Solve the Proportion
Set it up: % Proportions
Solve the %
???Mixed Questions???
Vocabulary
100
Brain Break: How many wheels does a tricycle have?
Answer: Three.
Fun Fact: The first pedal-powered tricycle was built in 1789.
100
1 is what percent of 5?
?/? = ?/100
1/5 = x/100
100
This percent of 5 is 1.
What is 20%?
100
Solve:
10 /k = 8/ 4
What is k= 5?
100
How do you convert a percent to a decimal?
Move the decimal 2 places to the left.
200
10/k = 8/4
What is k=5?
200
Brain Break: What are the primary colors?
Answer: Red, blue, and yellow.
Fun Fact: White is not really a color, it is the absence of color.
200
This percent of 8 is 6.
What is 75%?
200
Solve:
9 is 18% of this number.
What is x = 50?
200
Ratios that express the same relationship between two quantities.
What is an equivalent ratio?
300
6/a = 3/8
What is a=16?
300
What number is 25% of 40?
?/? = ?/100
x =10
300
This number is 15% of 20.
What is 3?
300
This set up shows
19 is what percent of 20?
19/20 = x/100
300
An equation stating that two ratios or rates are equivalent.
What is a proportion?
400
Brain Break: What fruit do raisins come from?
Answer: Grapes.
400
30 is 60% of what number?
?/? = ?/100
30/x = 60/100
400
This number is 25% of 40.
What is 10?
400
Solve:
7/9 = a/5
What is a = 3.88?
400
A ratio comparing two quantities with different kinds of units.
What is a rate?
500
p/8 = 13/2
What is p=52?
500
What percent of 8 is 6?
?/? = ?/100
6/8 = x/100
500
33 is 33% of this number
What is 100?
500
Brain Break: What is the hardest substance in your body?
Answer: Tooth enamel.
Fun Fact: A child has 20 teeth, and an adult has 32.
500
A comparison of two quantities by division.
What is a ratio?
600
v/12 = 10/2
What is v=60?
600
Find 15% of 20.
?/? = ?/100
x/20 = 15/100
600
90 is 60% of what number?
What is 150?
600
Set it up:
Find 55% of 120.
x/120 = 55/100
600
A table with columns filled with pairs of numbers that have the same ratio.
What is a ratio table?
700
3/x = 7/10
What is x =4.28?
700
15 is what percent of 150?
?/? = ?/100
15/150 = x/100
700
75% of 44?
What is 33?
700
Proportional or Not proportional?
12/7 and 36/21
PROPORTIONAL
700
A scale written as a ratio without units in simplest form.
What is a scale factor?
800
2/x = 7/9
What is x =2.57?
800
75% of 44
What is x/44 =75/100
800
This is the percent of 60 that is represented by 42
(What percent of 60 is 42?)
What is 70 percent?
800
Solve:
42 is what percent of 70?
What is 60%?
800
To multiply or divide two related quantities by the same number.
What is scaling?