# Question: 72 is 90 percent of what number

## Step by step solution for calculating 72 is 90 percent of what number

We already have our first value 72 and the second value 90. 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 72 = 90% × Y

STEP 2 72 = 90/100× Y

Multiplying both sides by 100 and dividing both sides of the equation by 90 we will arrive at:

STEP 3 Y = 72 × 100/90

STEP 4 Y = 72 × 100 ÷ 90

STEP 5 Y = 80

Finally, we have found the value of Y which is 80 and that is our answer.

You can easily calculate 72 is 90 percent of what number by using any regular calculator, simply enter 72 × 100 ÷ 90 and you will get your answer which is 80

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percent of what number

## Sample questions, answers, and how to

Question: Your friend has a bag of marbles, and he tells you that 90 percent of the marbles are red. If there are 72 red marbles. How many marbles does he have altogether?

How To: In this problem, we know that the Percent is 90, and we are also told that the Part of the marbles is red, so we know that the Part is 72.

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 72.

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

72 × 100 = 7200

In step two, we take that 7200 and divide it by the "Percent", which we are told is 90.

So, 7200 divided by 90 = 80

And that means that the total number of marbles is 80.

Question: A high school marching band has 72 flute players, If 90 percent of the band members play the flute, then how many members are in the band?

Answer: There are 80 members in the band.

How To: The smaller "Part" in this problem is 72 since there are 72 flute players and we are told that they make up 90 percent of the band, so the "Percent" is 90.

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.

72 × 100 = 7200

For step two, we divide that 7200 by the "Percent", which is 90.

7200 divided by 90 equals 80

That means that the total number of band members is 80.

## Have time and want to learn the calculation?

Let's assume the unknown value is Y

First writing it as: 100% / Y = 90% / 72

Drop the percentage marks to simplify your calculations: 100 / Y = 90 / 72

Multiply both sides by Y to move Y on the right side of the equation: 100 = ( 90 / 72 ) Y

Simplifying the right side, we get: 100 = 90 Y

Dividing both sides of the equation by 90, we will arrive at 80 = Y

This leaves us with our final answer: 72 is 90 percent of 80

## Percentage Table

 72 is 90 percent of 80 72.01 is 90 percent of 80.011 72.02 is 90 percent of 80.022 72.03 is 90 percent of 80.033 72.04 is 90 percent of 80.044 72.05 is 90 percent of 80.056 72.06 is 90 percent of 80.067 72.07 is 90 percent of 80.078 72.08 is 90 percent of 80.089 72.09 is 90 percent of 80.1 72.1 is 90 percent of 80.111 72.11 is 90 percent of 80.122 72.12 is 90 percent of 80.133 72.13 is 90 percent of 80.144 72.14 is 90 percent of 80.156 72.15 is 90 percent of 80.167 72.16 is 90 percent of 80.178 72.17 is 90 percent of 80.189 72.18 is 90 percent of 80.2 72.19 is 90 percent of 80.211
 72.2 is 90 percent of 80.222 72.21 is 90 percent of 80.233 72.22 is 90 percent of 80.244 72.23 is 90 percent of 80.256 72.24 is 90 percent of 80.267 72.25 is 90 percent of 80.278 72.26 is 90 percent of 80.289 72.27 is 90 percent of 80.3 72.28 is 90 percent of 80.311 72.29 is 90 percent of 80.322 72.3 is 90 percent of 80.333 72.31 is 90 percent of 80.344 72.32 is 90 percent of 80.356 72.33 is 90 percent of 80.367 72.34 is 90 percent of 80.378 72.35 is 90 percent of 80.389 72.36 is 90 percent of 80.4 72.37 is 90 percent of 80.411 72.38 is 90 percent of 80.422 72.39 is 90 percent of 80.433
 72.4 is 90 percent of 80.444 72.41 is 90 percent of 80.456 72.42 is 90 percent of 80.467 72.43 is 90 percent of 80.478 72.44 is 90 percent of 80.489 72.45 is 90 percent of 80.5 72.46 is 90 percent of 80.511 72.47 is 90 percent of 80.522 72.48 is 90 percent of 80.533 72.49 is 90 percent of 80.544 72.5 is 90 percent of 80.556 72.51 is 90 percent of 80.567 72.52 is 90 percent of 80.578 72.53 is 90 percent of 80.589 72.54 is 90 percent of 80.6 72.55 is 90 percent of 80.611 72.56 is 90 percent of 80.622 72.57 is 90 percent of 80.633 72.58 is 90 percent of 80.644 72.59 is 90 percent of 80.656
 72.6 is 90 percent of 80.667 72.61 is 90 percent of 80.678 72.62 is 90 percent of 80.689 72.63 is 90 percent of 80.7 72.64 is 90 percent of 80.711 72.65 is 90 percent of 80.722 72.66 is 90 percent of 80.733 72.67 is 90 percent of 80.744 72.68 is 90 percent of 80.756 72.69 is 90 percent of 80.767 72.7 is 90 percent of 80.778 72.71 is 90 percent of 80.789 72.72 is 90 percent of 80.8 72.73 is 90 percent of 80.811 72.74 is 90 percent of 80.822 72.75 is 90 percent of 80.833 72.76 is 90 percent of 80.844 72.77 is 90 percent of 80.856 72.78 is 90 percent of 80.867 72.79 is 90 percent of 80.878
 72.8 is 90 percent of 80.889 72.81 is 90 percent of 80.9 72.82 is 90 percent of 80.911 72.83 is 90 percent of 80.922 72.84 is 90 percent of 80.933 72.85 is 90 percent of 80.944 72.86 is 90 percent of 80.956 72.87 is 90 percent of 80.967 72.88 is 90 percent of 80.978 72.89 is 90 percent of 80.989 72.9 is 90 percent of 81 72.91 is 90 percent of 81.011 72.92 is 90 percent of 81.022 72.93 is 90 percent of 81.033 72.94 is 90 percent of 81.044 72.95 is 90 percent of 81.056 72.96 is 90 percent of 81.067 72.97 is 90 percent of 81.078 72.98 is 90 percent of 81.089 72.99 is 90 percent of 81.1