# Question: 18 is 40 percent of what number

## Step by step solution for calculating 18 is 40 percent of what number

We already have our first value 18 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 18 = 40% × Y

STEP 2 18 = 40/100× Y

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

STEP 3 Y = 18 × 100/40

STEP 4 Y = 18 × 100 ÷ 40

STEP 5 Y = 45

Finally, we have found the value of Y which is 45 and that is our answer.

You can easily calculate 18 is 40 percent of what number by using any regular calculator, simply enter 18 × 100 ÷ 40 and you will get your answer which is 45

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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 40 percent of the marbles are red. If there are 18 red marbles. How many marbles does he have altogether?

Answer: 45 marbles.

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 18.

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 18.

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

18 × 100 = 1800

In step two, we take that 1800 and divide it by the "Percent", which we are told is 40.

So, 1800 divided by 40 = 45

And that means that the total number of marbles is 45.

Question: A high school marching band has 18 flute players, If 40 percent of the band members play the flute, then how many members are in the band?

Answer: There are 45 members in the band.

How To: The smaller "Part" in this problem is 18 since there are 18 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.

18 × 100 = 1800

For step two, we divide that 1800 by the "Percent", which is 40.

1800 divided by 40 equals 45

That means that the total number of band members is 45.

## Have time and want to learn the calculation?

Let's assume the unknown value is Y

First writing it as: 100% / Y = 40% / 18

Drop the percentage marks to simplify your calculations: 100 / Y = 40 / 18

Multiply both sides by Y to move Y on the right side of the equation: 100 = ( 40 / 18 ) Y

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

Dividing both sides of the equation by 40, we will arrive at 45 = Y

This leaves us with our final answer: 18 is 40 percent of 45

## Percentage Table

 18 is 40 percent of 45 18.01 is 40 percent of 45.025 18.02 is 40 percent of 45.05 18.03 is 40 percent of 45.075 18.04 is 40 percent of 45.1 18.05 is 40 percent of 45.125 18.06 is 40 percent of 45.15 18.07 is 40 percent of 45.175 18.08 is 40 percent of 45.2 18.09 is 40 percent of 45.225 18.1 is 40 percent of 45.25 18.11 is 40 percent of 45.275 18.12 is 40 percent of 45.3 18.13 is 40 percent of 45.325 18.14 is 40 percent of 45.35 18.15 is 40 percent of 45.375 18.16 is 40 percent of 45.4 18.17 is 40 percent of 45.425 18.18 is 40 percent of 45.45 18.19 is 40 percent of 45.475
 18.2 is 40 percent of 45.5 18.21 is 40 percent of 45.525 18.22 is 40 percent of 45.55 18.23 is 40 percent of 45.575 18.24 is 40 percent of 45.6 18.25 is 40 percent of 45.625 18.26 is 40 percent of 45.65 18.27 is 40 percent of 45.675 18.28 is 40 percent of 45.7 18.29 is 40 percent of 45.725 18.3 is 40 percent of 45.75 18.31 is 40 percent of 45.775 18.32 is 40 percent of 45.8 18.33 is 40 percent of 45.825 18.34 is 40 percent of 45.85 18.35 is 40 percent of 45.875 18.36 is 40 percent of 45.9 18.37 is 40 percent of 45.925 18.38 is 40 percent of 45.95 18.39 is 40 percent of 45.975
 18.4 is 40 percent of 46 18.41 is 40 percent of 46.025 18.42 is 40 percent of 46.05 18.43 is 40 percent of 46.075 18.44 is 40 percent of 46.1 18.45 is 40 percent of 46.125 18.46 is 40 percent of 46.15 18.47 is 40 percent of 46.175 18.48 is 40 percent of 46.2 18.49 is 40 percent of 46.225 18.5 is 40 percent of 46.25 18.51 is 40 percent of 46.275 18.52 is 40 percent of 46.3 18.53 is 40 percent of 46.325 18.54 is 40 percent of 46.35 18.55 is 40 percent of 46.375 18.56 is 40 percent of 46.4 18.57 is 40 percent of 46.425 18.58 is 40 percent of 46.45 18.59 is 40 percent of 46.475
 18.6 is 40 percent of 46.5 18.61 is 40 percent of 46.525 18.62 is 40 percent of 46.55 18.63 is 40 percent of 46.575 18.64 is 40 percent of 46.6 18.65 is 40 percent of 46.625 18.66 is 40 percent of 46.65 18.67 is 40 percent of 46.675 18.68 is 40 percent of 46.7 18.69 is 40 percent of 46.725 18.7 is 40 percent of 46.75 18.71 is 40 percent of 46.775 18.72 is 40 percent of 46.8 18.73 is 40 percent of 46.825 18.74 is 40 percent of 46.85 18.75 is 40 percent of 46.875 18.76 is 40 percent of 46.9 18.77 is 40 percent of 46.925 18.78 is 40 percent of 46.95 18.79 is 40 percent of 46.975
 18.8 is 40 percent of 47 18.81 is 40 percent of 47.025 18.82 is 40 percent of 47.05 18.83 is 40 percent of 47.075 18.84 is 40 percent of 47.1 18.85 is 40 percent of 47.125 18.86 is 40 percent of 47.15 18.87 is 40 percent of 47.175 18.88 is 40 percent of 47.2 18.89 is 40 percent of 47.225 18.9 is 40 percent of 47.25 18.91 is 40 percent of 47.275 18.92 is 40 percent of 47.3 18.93 is 40 percent of 47.325 18.94 is 40 percent of 47.35 18.95 is 40 percent of 47.375 18.96 is 40 percent of 47.4 18.97 is 40 percent of 47.425 18.98 is 40 percent of 47.45 18.99 is 40 percent of 47.475