Step by step solution for calculating 15 is 30 percent that what number

We already have our very first value 15 and also the 2nd value 30. Let"s i think the unknown value is Y i beg your pardon answer we will uncover out.

You are watching: 15 is 30 of what number

As we have actually all the required values us need, currently we deserve 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 also dividing both political parties of the equation through 30 we will arrive at:

STEP 3Y = 15 × 100/30

STEP 4Y = 15 × 100 ÷ 30

STEP 5Y = 50

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

You can easily calculate 15 is 30 percent of what number by using any kind of regular calculator, simply get in 15 × 100 ÷ 30 and also you will obtain your answer which is 50


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Sample questions, answers, and also how to

Question: your friend has a bag of marbles, and also he tells you the 30 percent the the marbles space red. If there room 15 red marbles. How countless marbles walk he have altogether?

Answer: 50 marbles.

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

So, that method that it have to be the full that"s missing. Below is the way to number out what the complete is:

Part/Total = Percent/100

By utilizing a basic algebra we can re-arrange our Percent equation prefer 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 our problem around the marbles, that"s very simple and it"s just two steps! We know that the "Part" (red marbles) is 15.

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

15 × 100 = 1500

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

So, 1500 split by 30 = 50

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

Question: A high school marching band has 15 flute players, If 30 percent that the tape members beat the flute, then how numerous members space in the band?

Answer: There space 50 members in the band.

How To: The smaller "Part" in this trouble is 15 due to the fact that there are 15 flute players and we space told the they make up 30 percent that the band, therefore the "Percent" is 30.

Again, it"s the "Total" that"s lacking here, and to find it, we just need to monitor our 2 step procedure together the previous problem.

For action one, us multiply the "Part" through 100.

15 × 100 = 1500

For step two, we division that 1500 through the "Percent", i beg your pardon is 30.

See more: Greatest Common Factor Of 18 And 42 Gcf(18,42), Greatest Common Factor Of 42 And 18 Gcf(42,18)

1500 divided by 30 equals 50

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

Another action by action method

Step 1: Let"s assume the unknown worth is Y

Step 2: very first writing the as: 100% / Y = 30% / 15

Step 3: drop the portion marks to simplify your calculations: 100 / Y = 30 / 15

Step 4: multiply both political parties by Y to relocate Y on the best side of the equation: 100 = ( 30 / 15 ) Y

Step 5: simplifying the ideal side, we get: 100 = 30 Y

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

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


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