Question: 12 is 30 percent of what number

Answer: 12 is 30 percent of 40

Step by step solution for calculating 12 is 30 percent of what number

We already have our first value 12 and the second value 30. 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 = 30% × Y

STEP 2 12 = 30/100× Y

Multiplying both sides by 100 and dividing both sides of the equation by 30 we will arrive at:

STEP 3 Y = 12 × 100/30

STEP 4 Y = 12 × 100 ÷ 30

STEP 5 Y = 40

Finally, we have found the value of Y which is 40 and that is our answer.

You can easily calculate 12 is 30 percent of what number by using any regular calculator, simply enter 12 × 100 ÷ 30 and you will get your answer which is 40

You may also be interested in:

Here is a Percentage Calculator to solve similar calculations such as 12 is 30 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.

is
percent of what number

Sample questions, answers, and how to

Question: Your friend has a bag of marbles, and he tells you that 30 percent of the marbles are red. If there are 12 red marbles. How many marbles does he have altogether?

Answer: 40 marbles.

How To: In this problem, we know that the Percent is 30, 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 30.

So, 1200 divided by 30 = 40

And that means that the total number of marbles is 40.


Question: A high school marching band has 12 flute players, If 30 percent of the band members play the flute, then how many members are in the band?

Answer: There are 40 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 30 percent of the band, so the "Percent" is 30.

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 30.

1200 divided by 30 equals 40

That means that the total number of band members is 40.

Have time and want to learn the calculation?

Let's assume the unknown value is Y

First writing it as: 100% / Y = 30% / 12

Drop the percentage marks to simplify your calculations: 100 / Y = 30 / 12

Multiply both sides by Y to move Y on the right side of the equation: 100 = ( 30 / 12 ) Y

Simplifying the right side, we get: 100 = 30 Y

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

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

Percentage Table

12 is 30 percent of 40
12.01 is 30 percent of 40.033
12.02 is 30 percent of 40.067
12.03 is 30 percent of 40.1
12.04 is 30 percent of 40.133
12.05 is 30 percent of 40.167
12.06 is 30 percent of 40.2
12.07 is 30 percent of 40.233
12.08 is 30 percent of 40.267
12.09 is 30 percent of 40.3
12.1 is 30 percent of 40.333
12.11 is 30 percent of 40.367
12.12 is 30 percent of 40.4
12.13 is 30 percent of 40.433
12.14 is 30 percent of 40.467
12.15 is 30 percent of 40.5
12.16 is 30 percent of 40.533
12.17 is 30 percent of 40.567
12.18 is 30 percent of 40.6
12.19 is 30 percent of 40.633
12.2 is 30 percent of 40.667
12.21 is 30 percent of 40.7
12.22 is 30 percent of 40.733
12.23 is 30 percent of 40.767
12.24 is 30 percent of 40.8
12.25 is 30 percent of 40.833
12.26 is 30 percent of 40.867
12.27 is 30 percent of 40.9
12.28 is 30 percent of 40.933
12.29 is 30 percent of 40.967
12.3 is 30 percent of 41
12.31 is 30 percent of 41.033
12.32 is 30 percent of 41.067
12.33 is 30 percent of 41.1
12.34 is 30 percent of 41.133
12.35 is 30 percent of 41.167
12.36 is 30 percent of 41.2
12.37 is 30 percent of 41.233
12.38 is 30 percent of 41.267
12.39 is 30 percent of 41.3
12.4 is 30 percent of 41.333
12.41 is 30 percent of 41.367
12.42 is 30 percent of 41.4
12.43 is 30 percent of 41.433
12.44 is 30 percent of 41.467
12.45 is 30 percent of 41.5
12.46 is 30 percent of 41.533
12.47 is 30 percent of 41.567
12.48 is 30 percent of 41.6
12.49 is 30 percent of 41.633
12.5 is 30 percent of 41.667
12.51 is 30 percent of 41.7
12.52 is 30 percent of 41.733
12.53 is 30 percent of 41.767
12.54 is 30 percent of 41.8
12.55 is 30 percent of 41.833
12.56 is 30 percent of 41.867
12.57 is 30 percent of 41.9
12.58 is 30 percent of 41.933
12.59 is 30 percent of 41.967
12.6 is 30 percent of 42
12.61 is 30 percent of 42.033
12.62 is 30 percent of 42.067
12.63 is 30 percent of 42.1
12.64 is 30 percent of 42.133
12.65 is 30 percent of 42.167
12.66 is 30 percent of 42.2
12.67 is 30 percent of 42.233
12.68 is 30 percent of 42.267
12.69 is 30 percent of 42.3
12.7 is 30 percent of 42.333
12.71 is 30 percent of 42.367
12.72 is 30 percent of 42.4
12.73 is 30 percent of 42.433
12.74 is 30 percent of 42.467
12.75 is 30 percent of 42.5
12.76 is 30 percent of 42.533
12.77 is 30 percent of 42.567
12.78 is 30 percent of 42.6
12.79 is 30 percent of 42.633
12.8 is 30 percent of 42.667
12.81 is 30 percent of 42.7
12.82 is 30 percent of 42.733
12.83 is 30 percent of 42.767
12.84 is 30 percent of 42.8
12.85 is 30 percent of 42.833
12.86 is 30 percent of 42.867
12.87 is 30 percent of 42.9
12.88 is 30 percent of 42.933
12.89 is 30 percent of 42.967
12.9 is 30 percent of 43
12.91 is 30 percent of 43.033
12.92 is 30 percent of 43.067
12.93 is 30 percent of 43.1
12.94 is 30 percent of 43.133
12.95 is 30 percent of 43.167
12.96 is 30 percent of 43.2
12.97 is 30 percent of 43.233
12.98 is 30 percent of 43.267
12.99 is 30 percent of 43.3