# Question: 12 is 40 percent of what number?

## Step by step solution for calculating 12 is 40 percent of what number

We already have our first value 12 and the second value 40. Let's assume the unknown value is Y which answer we will find out.

As we have all the required values we need, Now we can put them in a simple mathematical formula as below:

STEP 1 12 = 40% × Y

STEP 2 12 = 40/100× Y

Multiplying both sides by 100 and dividing both sides of the equation by 40 we will arrive at:

STEP 3 Y = 12 × 100/40

STEP 4 Y = 12 × 100 ÷ 40

STEP 5 Y = 30

Finally, we have found the value of Y which is 30 and that is our answer. You can easily calculate 12 is 40 percent of what number by using any regular calculator, simply enter 12 × 100 ÷ 40 and you will get your answer which is 30 Here is a Percentage Calculator to solve similar calculations such as 12 is 40 percent of what number. You can solve this type of calculation with your values by entering them into the calculator's fields, and click 'Calculate' to get the result and explanation.

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## Sample questions, answers, and how to

Question: Your friend has a bag of marbles, and he tells you that 40 percent of the marbles are red. If there are 12 red marbles. How many marbles does he have altogether?

How To: In this problem, we know that the Percent is 40, and we are also told that the Part of the marbles is red, so we know that the Part is 12.

So, that means that it must be the Total that's missing. Here is the way to figure out what the Total is:

Part/Total = Percent/100

By using a simple algebra we can re-arrange our Percent equation like this:

Part × 100/Percent = Total

If we take the "Part" and multiply it by 100, and then we divide that by the "Percent", we will get the "Total".

Let's try it out on our problem about the marbles, that's very simple and it's just two steps! We know that the "Part" (red marbles) is 12.

So step one is to just multiply that Part by 100.

12 × 100 = 1200

In step two, we take that 1200 and divide it by the "Percent", which we are told is 40.

So, 1200 divided by 40 = 30

And that means that the total number of marbles is 30.

Question: A high school marching band has 12 flute players, If 40 percent of the band members play the flute, then how many members are in the band?

Answer: There are 30 members in the band.

How To: The smaller "Part" in this problem is 12 since there are 12 flute players and we are told that they make up 40 percent of the band, so the "Percent" is 40.

Again, it's the "Total" that's missing here, and to find it, we just need to follow our 2 step procedure as the previous problem.

For step one, we multiply the "Part" by 100.

12 × 100 = 1200

For step two, we divide that 1200 by the "Percent", which is 40.

1200 divided by 40 equals 30

That means that the total number of band members is 30.

## Another step by step method

Step 1: Let's assume the unknown value is Y

Step 2: First writing it as: 100% / Y = 40% / 12

Step 3: Drop the percentage marks to simplify your calculations: 100 / Y = 40 / 12

Step 4: Multiply both sides by Y to move Y on the right side of the equation: 100 = ( 40 / 12 ) Y

Step 5: Simplifying the right side, we get: 100 = 40 Y

Step 6: Dividing both sides of the equation by 40, we will arrive at 30 = Y

This leaves us with our final answer: 12 is 40 percent of 30

## Percentage Table

 12 is 40 percent of 30 12.01 is 40 percent of 30.025 12.02 is 40 percent of 30.05 12.03 is 40 percent of 30.075 12.04 is 40 percent of 30.1 12.05 is 40 percent of 30.125 12.06 is 40 percent of 30.15 12.07 is 40 percent of 30.175 12.08 is 40 percent of 30.2 12.09 is 40 percent of 30.225 12.1 is 40 percent of 30.25 12.11 is 40 percent of 30.275 12.12 is 40 percent of 30.3 12.13 is 40 percent of 30.325 12.14 is 40 percent of 30.35 12.15 is 40 percent of 30.375 12.16 is 40 percent of 30.4 12.17 is 40 percent of 30.425 12.18 is 40 percent of 30.45 12.19 is 40 percent of 30.475
 12.2 is 40 percent of 30.5 12.21 is 40 percent of 30.525 12.22 is 40 percent of 30.55 12.23 is 40 percent of 30.575 12.24 is 40 percent of 30.6 12.25 is 40 percent of 30.625 12.26 is 40 percent of 30.65 12.27 is 40 percent of 30.675 12.28 is 40 percent of 30.7 12.29 is 40 percent of 30.725 12.3 is 40 percent of 30.75 12.31 is 40 percent of 30.775 12.32 is 40 percent of 30.8 12.33 is 40 percent of 30.825 12.34 is 40 percent of 30.85 12.35 is 40 percent of 30.875 12.36 is 40 percent of 30.9 12.37 is 40 percent of 30.925 12.38 is 40 percent of 30.95 12.39 is 40 percent of 30.975
 12.4 is 40 percent of 31 12.41 is 40 percent of 31.025 12.42 is 40 percent of 31.05 12.43 is 40 percent of 31.075 12.44 is 40 percent of 31.1 12.45 is 40 percent of 31.125 12.46 is 40 percent of 31.15 12.47 is 40 percent of 31.175 12.48 is 40 percent of 31.2 12.49 is 40 percent of 31.225 12.5 is 40 percent of 31.25 12.51 is 40 percent of 31.275 12.52 is 40 percent of 31.3 12.53 is 40 percent of 31.325 12.54 is 40 percent of 31.35 12.55 is 40 percent of 31.375 12.56 is 40 percent of 31.4 12.57 is 40 percent of 31.425 12.58 is 40 percent of 31.45 12.59 is 40 percent of 31.475
 12.6 is 40 percent of 31.5 12.61 is 40 percent of 31.525 12.62 is 40 percent of 31.55 12.63 is 40 percent of 31.575 12.64 is 40 percent of 31.6 12.65 is 40 percent of 31.625 12.66 is 40 percent of 31.65 12.67 is 40 percent of 31.675 12.68 is 40 percent of 31.7 12.69 is 40 percent of 31.725 12.7 is 40 percent of 31.75 12.71 is 40 percent of 31.775 12.72 is 40 percent of 31.8 12.73 is 40 percent of 31.825 12.74 is 40 percent of 31.85 12.75 is 40 percent of 31.875 12.76 is 40 percent of 31.9 12.77 is 40 percent of 31.925 12.78 is 40 percent of 31.95 12.79 is 40 percent of 31.975
 12.8 is 40 percent of 32 12.81 is 40 percent of 32.025 12.82 is 40 percent of 32.05 12.83 is 40 percent of 32.075 12.84 is 40 percent of 32.1 12.85 is 40 percent of 32.125 12.86 is 40 percent of 32.15 12.87 is 40 percent of 32.175 12.88 is 40 percent of 32.2 12.89 is 40 percent of 32.225 12.9 is 40 percent of 32.25 12.91 is 40 percent of 32.275 12.92 is 40 percent of 32.3 12.93 is 40 percent of 32.325 12.94 is 40 percent of 32.35 12.95 is 40 percent of 32.375 12.96 is 40 percent of 32.4 12.97 is 40 percent of 32.425 12.98 is 40 percent of 32.45 12.99 is 40 percent of 32.475