## Step by step solution for calculating 12 is 10 percent of what number

We already have our first value **12** and the second value **10**. Let"s assume the unknown value is **Y** which answer we will find out.

You are watching: 10 is what percent of 12

As we have all the required values we need, Now we can put them in a simple mathematical formula as below:

STEP 112 = 10% × Y

STEP 212 = 10/100× Y

Multiplying both sides by 100 and dividing both sides of the equation by 10 we will arrive at:

STEP 3Y = 12 × 100/10

STEP 4Y = 12 × 100 ÷ 10

STEP 5Y = 120

Finally, we have found the value of Y which is 120 and that is our answer.

You can easily calculate **12 is 10 percent of what number** by using any regular calculator, simply enter **12 × 100 ÷ 10** and you will get your answer which is **120**

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## Sample questions, answers, and how to

**Question:** Your friend has a bag of marbles, and he tells you that 10 percent of the marbles are red. If there are 12 red marbles. How many marbles does he have altogether?

**Answer:** 120 marbles.

**How To:** In this problem, we know that the Percent is 10, and we are also told that the Part of the marbles is red, so we know that the Part is 12.

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 12.

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

12 × 100 = 1200

In step two, we take that 1200 and divide it by the "Percent", which we are told is 10.

So, 1200 divided by 10 = 120

And that means that the total number of marbles is 120.

**Question:** A high school marching band has 12 flute players, If 10 percent of the band members play the flute, then how many members are in the band?

**Answer:** There are 120 members in the band.

**How To:** The smaller "Part" in this problem is 12 since there are 12 flute players and we are told that they make up 10 percent of the band, so the "Percent" is 10.

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.

12 × 100 = 1200

For step two, we divide that 1200 by the "Percent", which is 10.

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1200 divided by 10 equals 120

That means that the total number of band members is 120.

## Another step by step method

**Step 1:** Let"s assume the unknown value is **Y**

**Step 2:** First writing it as: **100% / Y = 10% / 12**

**Step 3:** Drop the percentage marks to simplify your calculations: **100 / Y = 10 / 12**

**Step 4:** Multiply both sides by Y to move Y on the right side of the equation: **100 = ( 10 / 12 ) Y**

**Step 5:** Simplifying the right side, we get: **100 = 10 Y**

**Step 6:** Dividing both sides of the equation by 10, we will arrive at **120 = Y**

This leaves us with our final answer: **12 is 10 percent of 120**

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