Step by action solution because that calculating 15 is 30 percent that what number

We already have our an initial value 15 and also the second value 30. Let"s i think the unknown value is Y which answer we will discover out.

You are watching: 15 is 30 of what number

As we have all the compelled values us need, currently we have the right to put castle in a simple mathematical formula as below:

STEP 115 = 30% × Y

STEP 215 = 30/100× Y

Multiplying both political parties by 100 and dividing both political parties of the equation by 30 we will certainly arrive at:

STEP 3Y = 15 × 100/30

STEP 4Y = 15 × 100 ÷ 30

STEP 5Y = 50

Finally, we have discovered the value of Y i m sorry is 50 and that is our answer.

You can quickly calculate 15 is 30 percent the what number through using any regular calculator, simply enter 15 × 100 ÷ 30 and also you will get your answer i m sorry is 50


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Sample questions, answers, and how to

Question: her friend has actually a bag that marbles, and also he speak you that 30 percent of the marbles space red. If there are 15 red marbles. How plenty of marbles walk he have actually altogether?

Answer: 50 marbles.

How To: In this problem, we understand that the Percent is 30, and also we are additionally told that the component of the marbles is red, therefore we understand that the component is 15.

So, that way that it should be the full that"s missing. Here is the means to figure out what the complete is:

Part/Total = Percent/100

By making use of a basic algebra we deserve to re-arrange our Percent equation choose this:

Part × 100/Percent = Total

If we take the "Part" and multiply the by 100, and also then we division that through the "Percent", us will obtain the "Total".

Let"s try it the end on ours problem around the marbles, that"s very straightforward and it"s simply two steps! We understand that the "Part" (red marbles) is 15.

So action one is to simply multiply that part by 100.

15 × 100 = 1500

In action two, us take that 1500 and divide that by the "Percent", i m sorry we space told is 30.

So, 1500 split by 30 = 50

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

Question: A high institution marching band has 15 flute players, If 30 percent that the tape members pat the flute, climate how countless members room in the band?

Answer: There room 50 members in the band.

How To: The smaller sized "Part" in this trouble is 15 because there room 15 flute players and we are told that they consist of 30 percent that the band, so the "Percent" is 30.

Again, it"s the "Total" that"s lacking here, and to find it, we simply need to follow our 2 action procedure as the ahead problem.

For step one, us multiply the "Part" by 100.

15 × 100 = 1500

For action two, we divide that 1500 by the "Percent", which is 30.

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1500 divided by 30 equals 50

That way that the total variety of band members is 50.

Another action by step method

Step 1: Let"s i think the unknown value is Y

Step 2: an initial writing the as: 100% / Y = 30% / 15

Step 3: autumn the percent marks to simplify your calculations: 100 / Y = 30 / 15

Step 4: main point both sides by Y to relocate Y ~ above the best side the the equation: 100 = ( 30 / 15 ) Y

Step 5: simplifying the appropriate side, us get: 100 = 30 Y

Step 6: separating both sides of the equation by 30, we will arrive in ~ 50 = Y

This leaves us with our final answer: 15 is 30 percent the 50


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