# Question: 45 is 90 percent of what number

## Step by step solution for calculating 45 is 90 percent of what number

We already have our first value 45 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 45 = 90% × Y

STEP 2 45 = 90/100× Y

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

STEP 3 Y = 45 × 100/90

STEP 4 Y = 45 × 100 ÷ 90

STEP 5 Y = 50

Finally, we have found the value of Y which is 50 and that is our answer.

You can easily calculate 45 is 90 percent of what number by using any regular calculator, simply enter 45 × 100 ÷ 90 and you will get your answer which is 50

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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 45 red marbles. How many marbles does he have altogether?

Answer: 50 marbles.

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 45.

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 45.

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

45 × 100 = 4500

In step two, we take that 4500 and divide it by the "Percent", which we are told is 90.

So, 4500 divided by 90 = 50

And that means that the total number of marbles is 50.

Question: A high school marching band has 45 flute players, If 90 percent of the band members play the flute, then how many members are in the band?

Answer: There are 50 members in the band.

How To: The smaller "Part" in this problem is 45 since there are 45 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.

45 × 100 = 4500

For step two, we divide that 4500 by the "Percent", which is 90.

4500 divided by 90 equals 50

That means that the total number of band members is 50.

## Have time and want to learn the calculation?

Let's assume the unknown value is Y

First writing it as: 100% / Y = 90% / 45

Drop the percentage marks to simplify your calculations: 100 / Y = 90 / 45

Multiply both sides by Y to move Y on the right side of the equation: 100 = ( 90 / 45 ) Y

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

Dividing both sides of the equation by 90, we will arrive at 50 = Y

This leaves us with our final answer: 45 is 90 percent of 50

## Percentage Table

 45 is 90 percent of 50 45.01 is 90 percent of 50.011 45.02 is 90 percent of 50.022 45.03 is 90 percent of 50.033 45.04 is 90 percent of 50.044 45.05 is 90 percent of 50.056 45.06 is 90 percent of 50.067 45.07 is 90 percent of 50.078 45.08 is 90 percent of 50.089 45.09 is 90 percent of 50.1 45.1 is 90 percent of 50.111 45.11 is 90 percent of 50.122 45.12 is 90 percent of 50.133 45.13 is 90 percent of 50.144 45.14 is 90 percent of 50.156 45.15 is 90 percent of 50.167 45.16 is 90 percent of 50.178 45.17 is 90 percent of 50.189 45.18 is 90 percent of 50.2 45.19 is 90 percent of 50.211
 45.2 is 90 percent of 50.222 45.21 is 90 percent of 50.233 45.22 is 90 percent of 50.244 45.23 is 90 percent of 50.256 45.24 is 90 percent of 50.267 45.25 is 90 percent of 50.278 45.26 is 90 percent of 50.289 45.27 is 90 percent of 50.3 45.28 is 90 percent of 50.311 45.29 is 90 percent of 50.322 45.3 is 90 percent of 50.333 45.31 is 90 percent of 50.344 45.32 is 90 percent of 50.356 45.33 is 90 percent of 50.367 45.34 is 90 percent of 50.378 45.35 is 90 percent of 50.389 45.36 is 90 percent of 50.4 45.37 is 90 percent of 50.411 45.38 is 90 percent of 50.422 45.39 is 90 percent of 50.433
 45.4 is 90 percent of 50.444 45.41 is 90 percent of 50.456 45.42 is 90 percent of 50.467 45.43 is 90 percent of 50.478 45.44 is 90 percent of 50.489 45.45 is 90 percent of 50.5 45.46 is 90 percent of 50.511 45.47 is 90 percent of 50.522 45.48 is 90 percent of 50.533 45.49 is 90 percent of 50.544 45.5 is 90 percent of 50.556 45.51 is 90 percent of 50.567 45.52 is 90 percent of 50.578 45.53 is 90 percent of 50.589 45.54 is 90 percent of 50.6 45.55 is 90 percent of 50.611 45.56 is 90 percent of 50.622 45.57 is 90 percent of 50.633 45.58 is 90 percent of 50.644 45.59 is 90 percent of 50.656
 45.6 is 90 percent of 50.667 45.61 is 90 percent of 50.678 45.62 is 90 percent of 50.689 45.63 is 90 percent of 50.7 45.64 is 90 percent of 50.711 45.65 is 90 percent of 50.722 45.66 is 90 percent of 50.733 45.67 is 90 percent of 50.744 45.68 is 90 percent of 50.756 45.69 is 90 percent of 50.767 45.7 is 90 percent of 50.778 45.71 is 90 percent of 50.789 45.72 is 90 percent of 50.8 45.73 is 90 percent of 50.811 45.74 is 90 percent of 50.822 45.75 is 90 percent of 50.833 45.76 is 90 percent of 50.844 45.77 is 90 percent of 50.856 45.78 is 90 percent of 50.867 45.79 is 90 percent of 50.878
 45.8 is 90 percent of 50.889 45.81 is 90 percent of 50.9 45.82 is 90 percent of 50.911 45.83 is 90 percent of 50.922 45.84 is 90 percent of 50.933 45.85 is 90 percent of 50.944 45.86 is 90 percent of 50.956 45.87 is 90 percent of 50.967 45.88 is 90 percent of 50.978 45.89 is 90 percent of 50.989 45.9 is 90 percent of 51 45.91 is 90 percent of 51.011 45.92 is 90 percent of 51.022 45.93 is 90 percent of 51.033 45.94 is 90 percent of 51.044 45.95 is 90 percent of 51.056 45.96 is 90 percent of 51.067 45.97 is 90 percent of 51.078 45.98 is 90 percent of 51.089 45.99 is 90 percent of 51.1