1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
tatiyna
3 years ago
9

How does a percent relate to a proportion

Mathematics
1 answer:
MaRussiya [10]3 years ago
7 0
Percent means per hundred, which means, when you are using a percent, you are actually using a ratio to compare  the number of your percent to one hundred.
For example, suppose we have 5%. The percent symbol (%) indicates that we are using a ratio to compare 5 to 100, and remember that we use fractions to express ratios, so we can express 5% as the ratio \frac{5}{100}. Notice that we can simplify our ratio, both numerator and denominator are divisible by 5, so lets simplify it: \frac{5}{100} = \frac{1}{20}. We can conclude that we can express 5% as the ratio \frac{1}{20}.

Now that we know we can express a percent as ratio, lets show how the percent is related to a proportion:
Suppose that in a class of 30 students are 12 girls, and you want to find <span>how many percent of girls are in your class using a proportion:
Let </span>x% be the percent girls. Since we know that percents can be expressed as ratios, x%=\frac{x}{100}: Now we can use the fact that the students are in a ratio 12 to 30 to establish our proportion:
\frac{12}{30} = \frac{x}{100}
x= \frac{(12)(100)}{30}
x=40
We just prove that 40% of the students are girls.

The proportion that we used in this problem is called a percent proportion, and its formula: \frac{a}{b} = \frac{x}{100} can be use to relate a percent with a proportion.
You might be interested in
What are three equivalents for 3/5
snow_tiger [21]
<span>Three equivalent fractions are, 6/10, 9/15, 12/20</span>
7 0
3 years ago
Read 2 more answers
Can someone explain to me how to do question number 6 please?
kirill115 [55]
Do the crossing out method. so if it is 2.50 per pound for peaches, try A, 11 pounds. 2.50 times 11 is 27.5, and now we have the rest, 154 pounds as apples so we multiply it by 1.75 which is 269.5, we add them up and we dont get 337.50, so we try out b,  18 times 2.5 is 45 so we still have 147 pounds left for apples, multiply it by 1.75 which is 257.25 and if we add up 45 and 257.25 we dont get 337.5 so now we try c which is 65, multiply it by 2.5 its 162.5 and we have 100 pounds of apples left. we do the same and we get 175, 175 plus 162.5 is 337.5 so C/3 is the correct answer
6 0
3 years ago
Add and reduce 2/7+ 16/21=
max2010maxim [7]

Answer:

6/7

Step-by-step explanation:

8 0
3 years ago
Circumference (rounding)
LUCKY_DIMON [66]

Answer:

19.5

Step-by-step explanation:

Circumference is radius multiplied by 2, then multiplied by pi.

3.1 × 2= 6.2

6.2 × π= 19.477 ≈ 19.5

π also equals 3.14

4 0
3 years ago
Read 2 more answers
Help me pls AAAAAAAA
erastovalidia [21]

Answer:

10/3 liters

Step-by-step explanation:

Divide (4/3) by 2, then multiply by 5

4 0
3 years ago
Read 2 more answers
Other questions:
  • Y = 3x + 5 step 1 of 3: determine the slope and y-intercept of the equation above
    12·1 answer
  • I would really appreciate help
    15·1 answer
  • What is 3 divided by .075
    15·2 answers
  • -3 - -15 + -8 - 3 x -17
    15·1 answer
  • A prom ticket cost $140. Tim is going to save money for the ticket by walking his neighbor’s dog for $18 per week. If Tim alread
    8·2 answers
  • Y=3x+2 is the equation of a straight line graph. Where does it cross the y-axis?
    11·1 answer
  • Which equation represents the graphed function?
    9·1 answer
  • 6 2/3 divided by 1 1/2 =
    6·1 answer
  • Lines x and y are parallel and are cut by the transversal b. If the measure of angle 1 is 57°, what is the measure of angle 6? E
    14·1 answer
  • PLEASE HELP QUICK. I'll give brainliest. <br> Write 70x - 100 = 850 as a word problem
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!