How much percent how many

Our students are often asked to describe a chart for their online classes. We have to ask follow-up or guide questions to help them describe it and I often ask my students about how many votes did an item in the chart get. So, is it incorrect to say:. This is because a percentage is a singular item.

It is one percentage no matter what the number in the percentage is. So when you're referring to a percentage, you say what to signal a singular item instead of how many which signals multiple items.

Sign up to join this community. The best answers are voted up and rise to the top. Stack Overflow for Teams — Collaborate and share knowledge with a private group. The formula for solving a percentage change is the following:. You would then divide this by the old price: 25 divide by equals 0. You will then multiply this number by 0. You will then divide this number by the old price: 25 divided by equals 0.

You would then multiply this by 0. You can use percentages to compare two different items that are related to each other. For example, you may want to determine how much a product cost last year versus how much a similar product costs this year.

This calculation would give you the percent difference between the two product prices. In this formula, V1 is equal to the cost of one product, and V2 is equal to the cost of the other product. You will then divide 5 by You will then multiply 0. Find jobs. Company reviews. Find salaries. Upload your resume. Sign in. Note: If you want to view the explanation for how a certain percentage is calculated, just click the icon next to the answer.

Every calculation is fully broken down and explained for you so that you can learn the math behind percentages. The calculation is pretty simple, but if you have any problems or get any errors, please contact us. Let's go with something a bit harder and four times more delicious: cookies!

We're dividing them evenly, and every compartment gets four cookies. Cookies look smaller, but in our imagination, they are the same, just the drawer is much bigger! One percent of is 4. How about 15 percent? It's 15 compartments times four cookies - 60 cookies. Our tummies start to ache a little, but it has never stopped us from eating more cookies! Now, something even harder - cookies. Oh-oh, we divided up the first cookies, placing two in every compartment.

Now we are left with 50 cookies that need to be spread evenly, hmmm, it's half a cookie in every box. How to calculate the percentage? You are right - this time, 1 percent of the total number of cookies is 2. How many do we have in 15 boxes? So what is percentage good for? As we wrote earlier, a percentage is a way to express a ratio. Say you are taking a graded exam.

If we told you that you got points, it really would not tell you anything. Even if we told you, you got out of ; it's harder to feel how well you did.

Isn't the percent sign helpful? After all, it's the percentage that counts! What about decimal fractions and percentages? Percentages can easily be converted to decimals. Just divide the percentage by , and you are set. So as we have shown before, 0.

Percentages are sometimes better at expressing various quantities than decimal fractions in chemistry or physics. For example, it is much convenient to say that percentage concentration of a specific substance is Another example is efficiency or its special case - Carnot efficiency.

What do you think? We are sure that you're already well aware that knowing how to get a percentage of a number is a valuable ability.

While it's certainly quick and painless just to use our percentage calculator, you don't always have access to a computer or a smartphone. Also, it's just plain cool to be able to perform calculations in your head. Maybe not as cool as juggling flaming torches, but close. The percentage tells you how number A relates to number B. A real-world example could be: there are two girls in a group of five children.

What's the percentage of girls? In other words, we want to know what's the ratio of girls to all children. We call the first number 2 a numerator and the second number 5 a denominator because this is a fraction. To calculate the percentage, multiply this fraction by and add a percent sign.

Forty percent of the group are girls. That's the entire procedure of converting between decimal fractions and percentages. Speaking of decimal fractions, there is a way to write very big or very small numbers concisely.

Check it out with our scientific notation calculator! Do you have problems with simplifying fractions? It searches all the factors of both numbers and then shows the greatest common one. Let's go the other way around and try to find the numerator. Say we know that 70 percent of fruits in the basket are apples, and there are 30 fruits altogether. It could be worse - they could be lemons. So how many apples do we have? We want to find out the numerator.

Let's move all the other parts of the equation to the other side.