Proportional or Not
Solve the Proportion
Set it up: % Proportions
Solve the % Proportion
???Mixed Questions???
100
`4/2 and 20/6`
NOT proportional
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
1 is what percent of 5?
x = 20
100
Solve:
`10 /k = 8/ 4`
`
`
k= 5
200
`3/2 and 18/8`
NOT proportional
200
`10/k = 8/4`
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
What percent of 8 is 6?
x = 75
200
Solve:
9 is 18% of what number?
x = 50
300
Brain Break: How many colors are in a rainbow?
Answer: Seven.
Fun Fact: The colors, in order from the top, are red, orange, yellow, green, blue, indigo, violet.
300
`6/a = 3/8`
16
300
What number is 25% of 40?
`?/? = ?/100`
x =10
300
Find 15% of 20.
x = 3
300
Set it up:
19 is what percent of 20?
`19/20 = x/100`
400
`4/3 and 16/12`
PROPORTIONAL
400
Brain Break: What fruit do raisins come from?
Answer: Grapes.
400
30 is 60% of what number?
`?/? = ?/100`
`30/x = 60/100`
400
What number is 25% of 40?
x = 10
400
Solve:
`7/9 = a/5`
a = 3.88
500
`4/3 and 8/6`
PROPORTIONAL
500
`p/8 = 13/2`
52
500
What percent of 8 is 6?
?/? = ?/100
`6/8 = x/100`
500
33 is 33% of what number?
x = 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.
600
`12/24 and 3/4`
NOT proportional
600
`v/12 = 10/2`
60
600
Find 15% of 20.
?/? = ?/100
`x/20 = 15/100`
600
90 is 60% of what number?
x = 150
600
Set it up:
Find 55% of 120.
`x/120 = 55/100`
700
Brain Break: How many cents are in a quarter?
25
700
`3/x = 7/10`
4.28
700
15 is what percent of 150?
?/? = ?/100
`15/150 = x/100`
700
What number is 75% of 44?
x = 33
700
Proportional or Not?
`12/7 and 36/21`
PROPORTIONAL
800
`6/9 and 2/3`
PROPORTIONAL
800
`2/x = 7/9`
2.57
800
What number is 75% of 44?
?/? = ?/100
`x/44 = 75/100`
800
What percent of 60 is 42?
x = 70
800
Solve:
46 is what percent of 69?
x = 66.67