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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.
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Lizeth earns $600 biweekly. What is her yearly salary?
nalin [4]

Answer:

31200.

Step-by-step explanation:

52 ×600

8 0
3 years ago
Gabriel invested $77,000 in an account paying an interest rate of 3%
const2013 [10]

Answer:

Isabella earn 5604.54 more money than  Gabriel

Step-by-step explanation:

As we know

Compound interest (CI) = P (1 + \frac{r}{n})^{nt}

P is the principal amount

t is the time period

n is the number of time periods

r is the rate of interest

a)  CI for  Gabriel

= 77000 (1 + \frac{3}{100*12})^{12*6} = 92165.03 dollars

b) CI for Isabella

= 77000 (1 + \frac{4}{100*4})^{4*6} = 97769.57 dollars

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7 0
3 years ago
Write a proportion for the statement.<br> 40 is to 10 as 32 is to 8.
Svetach [21]

Hi! ⋇

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  All proportions have <u>this</u> <u>form</u>:

  \sf{\dfrac{a}{b}=\dfrac{c}{d}}, Where \sf{\dfrac{a}{b}} is equal to \sf{\dfrac{c}{d}}.

 If \sf{\dfrac{a}{b}\neq\dfrac{c}{d}}, it's <u>not</u> a proportion.

_________________________

  Here we have two pairs of numbers:

40,10 and 32,8.

Written As a <u>proportion</u>, they <em>look like</em> :

\sf{\dfrac{40}{10}=\dfrac{32}{8}}

Hope this made sense to you :)

\it{Calligrxphy}

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6 0
2 years ago
Pls answer and get branily
Dennis_Churaev [7]

Answer:

Just put 4 basketballs and 5 baseballs in each one

Step-by-step explanation:

If you think about it you will know that each ratio there is the same. So, you do the same thing each time.

All you have to do now is read. It says put 4 basketballs and 5 baseballs.

I hope this helped ;)

6 0
3 years ago
License plate numbers come in a variety of styles. (Ignore the fact that some choices of letters could not be used because they
avanturin [10]
Five digit is the answer
3 0
3 years ago
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