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How do you solve 2 is 40 percent of what number using proportions?
Wiki User
∙ 11y ago
Write an equation: 2=40%n
(n stands for the number)
2=40/100 *n
transform the equation by using inverse operations (see Mr. Nystrom on YouTube)
(2/n)=40/100*(n/n)
2/n=40/100
cross multiply to get 40n=200
use transformations agian
40n/40=200/40
we get n=200/40
n=5
so the answer is 5
Wiki User
∙ 11y ago
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What is 6 percent of a gallon?
It is not 6 like he previous person said, the answer will be solved by using proportions.
12 is added to 25 percent of a number and equals 30 what is the number?
Using algebra to solve this problem (12 + .25x = 30), the answer (x) is 72.
What mathematical skills are required to solve problems using proportions?
Three mathematical concepts are inherent to solving proportional equations. The first is algebraic operations, and using the same process on both sides of the parenthesis' expression. Other algebraic skills include cross-multiplication, division, and simplification of quantities. The second is an understanding of percent's and fractions, which can help visualize the proportions.
How do you solve proportions using cross products?
say it is 1 over 2 is equal to x over 4 you multiply 4 and 1 then 2 and x and you get 4=2x. Solve for x = 2. So the equivalent proportion is 2/4.
A percent is a comparison of a number to 100 using what operation?
A percent is calculated by dividing a number by 100.
What are three ways to solve for percents using proportions?
nevermind, i just realized it. It's is/of=%/100
What is 6 percent of a gallon?
It is not 6 like he previous person said, the answer will be solved by using proportions.
12 is added to 25 percent of a number and equals 30 what is the number?
Using algebra to solve this problem (12 + .25x = 30), the answer (x) is 72.
What mathematical skills are required to solve problems using proportions?
Three mathematical concepts are inherent to solving proportional equations. The first is algebraic operations, and using the same process on both sides of the parenthesis' expression. Other algebraic skills include cross-multiplication, division, and simplification of quantities. The second is an understanding of percent's and fractions, which can help visualize the proportions.
What is the technique of using similar figures and proportions to find a measure?
Number over x is equal to number over number; indirect measurement
How to solve percentage problem?
A percentage is a number or ratio expressed as a fraction of 100. It is often denoted using the percent sign, as in 45% (read as "forty-five percent"). In mathematics, it is defined as the difference between a number and 100 divided by the number . In most contexts, a percentage is a number between 0 (zero) and 100.
A percent is a comparison of a number to 100 using what operation?
A percent is calculated by dividing a number by 100.
How do you solve proportions using cross products?
say it is 1 over 2 is equal to x over 4 you multiply 4 and 1 then 2 and x and you get 4=2x. Solve for x = 2. So the equivalent proportion is 2/4.
How do you do percent of a number on a calculator?
Two choices: -- Multiply (the number) x (the percent using the percent % key). -- Multiply (the number) x (the percent), then divide the answer by 100. Either way, the claculator displays that many percent of that number.
How do you solve a problem using ratios and proportions?
That question is a lot like asking "How do you build what the customer ordered using a hammer and a saw ?" Before you can decide how to use your tools and what to do with them, you need to know what the customer ordered, and what final product is expected.
How do you find 31 percent of 200?
To find 31 percent of 200 you will solve it like this: 31% of 200 is: 0.31* 200= 62. Using a calculator will also help.
How do you solve very large prime number?
Using supercomputers and very clever programming.
