# Question: 21 is 75 percent of what number

## Step by step solution for calculating 21 is 75 percent of what number

We already have our first value 21 and the second value 75. 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 21 = 75% × Y

STEP 2 21 = 75/100× Y

Multiplying both sides by 100 and dividing both sides of the equation by 75 we will arrive at:

STEP 3 Y = 21 × 100/75

STEP 4 Y = 21 × 100 ÷ 75

STEP 5 Y = 28

Finally, we have found the value of Y which is 28 and that is our answer.

You can easily calculate 21 is 75 percent of what number by using any regular calculator, simply enter 21 × 100 ÷ 75 and you will get your answer which is 28

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Here is a Percentage Calculator to solve similar calculations such as 21 is 75 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 75 percent of the marbles are red. If there are 21 red marbles. How many marbles does he have altogether?

How To: In this problem, we know that the Percent is 75, and we are also told that the Part of the marbles is red, so we know that the Part is 21.

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 21.

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

21 × 100 = 2100

In step two, we take that 2100 and divide it by the "Percent", which we are told is 75.

So, 2100 divided by 75 = 28

And that means that the total number of marbles is 28.

Question: A high school marching band has 21 flute players, If 75 percent of the band members play the flute, then how many members are in the band?

Answer: There are 28 members in the band.

How To: The smaller "Part" in this problem is 21 since there are 21 flute players and we are told that they make up 75 percent of the band, so the "Percent" is 75.

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.

21 × 100 = 2100

For step two, we divide that 2100 by the "Percent", which is 75.

2100 divided by 75 equals 28

That means that the total number of band members is 28.

## Have time and want to learn the calculation?

Let's assume the unknown value is Y

First writing it as: 100% / Y = 75% / 21

Drop the percentage marks to simplify your calculations: 100 / Y = 75 / 21

Multiply both sides by Y to move Y on the right side of the equation: 100 = ( 75 / 21 ) Y

Simplifying the right side, we get: 100 = 75 Y

Dividing both sides of the equation by 75, we will arrive at 28 = Y

This leaves us with our final answer: 21 is 75 percent of 28

## Percentage Table

 21 is 75 percent of 28 21.01 is 75 percent of 28.013 21.02 is 75 percent of 28.027 21.03 is 75 percent of 28.04 21.04 is 75 percent of 28.053 21.05 is 75 percent of 28.067 21.06 is 75 percent of 28.08 21.07 is 75 percent of 28.093 21.08 is 75 percent of 28.107 21.09 is 75 percent of 28.12 21.1 is 75 percent of 28.133 21.11 is 75 percent of 28.147 21.12 is 75 percent of 28.16 21.13 is 75 percent of 28.173 21.14 is 75 percent of 28.187 21.15 is 75 percent of 28.2 21.16 is 75 percent of 28.213 21.17 is 75 percent of 28.227 21.18 is 75 percent of 28.24 21.19 is 75 percent of 28.253
 21.2 is 75 percent of 28.267 21.21 is 75 percent of 28.28 21.22 is 75 percent of 28.293 21.23 is 75 percent of 28.307 21.24 is 75 percent of 28.32 21.25 is 75 percent of 28.333 21.26 is 75 percent of 28.347 21.27 is 75 percent of 28.36 21.28 is 75 percent of 28.373 21.29 is 75 percent of 28.387 21.3 is 75 percent of 28.4 21.31 is 75 percent of 28.413 21.32 is 75 percent of 28.427 21.33 is 75 percent of 28.44 21.34 is 75 percent of 28.453 21.35 is 75 percent of 28.467 21.36 is 75 percent of 28.48 21.37 is 75 percent of 28.493 21.38 is 75 percent of 28.507 21.39 is 75 percent of 28.52
 21.4 is 75 percent of 28.533 21.41 is 75 percent of 28.547 21.42 is 75 percent of 28.56 21.43 is 75 percent of 28.573 21.44 is 75 percent of 28.587 21.45 is 75 percent of 28.6 21.46 is 75 percent of 28.613 21.47 is 75 percent of 28.627 21.48 is 75 percent of 28.64 21.49 is 75 percent of 28.653 21.5 is 75 percent of 28.667 21.51 is 75 percent of 28.68 21.52 is 75 percent of 28.693 21.53 is 75 percent of 28.707 21.54 is 75 percent of 28.72 21.55 is 75 percent of 28.733 21.56 is 75 percent of 28.747 21.57 is 75 percent of 28.76 21.58 is 75 percent of 28.773 21.59 is 75 percent of 28.787
 21.6 is 75 percent of 28.8 21.61 is 75 percent of 28.813 21.62 is 75 percent of 28.827 21.63 is 75 percent of 28.84 21.64 is 75 percent of 28.853 21.65 is 75 percent of 28.867 21.66 is 75 percent of 28.88 21.67 is 75 percent of 28.893 21.68 is 75 percent of 28.907 21.69 is 75 percent of 28.92 21.7 is 75 percent of 28.933 21.71 is 75 percent of 28.947 21.72 is 75 percent of 28.96 21.73 is 75 percent of 28.973 21.74 is 75 percent of 28.987 21.75 is 75 percent of 29 21.76 is 75 percent of 29.013 21.77 is 75 percent of 29.027 21.78 is 75 percent of 29.04 21.79 is 75 percent of 29.053
 21.8 is 75 percent of 29.067 21.81 is 75 percent of 29.08 21.82 is 75 percent of 29.093 21.83 is 75 percent of 29.107 21.84 is 75 percent of 29.12 21.85 is 75 percent of 29.133 21.86 is 75 percent of 29.147 21.87 is 75 percent of 29.16 21.88 is 75 percent of 29.173 21.89 is 75 percent of 29.187 21.9 is 75 percent of 29.2 21.91 is 75 percent of 29.213 21.92 is 75 percent of 29.227 21.93 is 75 percent of 29.24 21.94 is 75 percent of 29.253 21.95 is 75 percent of 29.267 21.96 is 75 percent of 29.28 21.97 is 75 percent of 29.293 21.98 is 75 percent of 29.307 21.99 is 75 percent of 29.32