## Step by action solution because that calculating 21 is 75 percent of what number

We already have our very first value 21 and the 2nd value 75. Let"s assume the unknown worth is Y which answer we will uncover out.

You are watching: 21 is 75 of what number

As we have all the compelled values we need, currently we can put them in a an easy mathematical formula as below:

STEP 121 = 75% × Y

STEP 221 = 75/100× Y

Multiplying both political parties by 100 and also dividing both political parties of the equation by 75 we will arrive at:

STEP 3Y = 21 × 100/75

STEP 4Y = 21 × 100 ÷ 75

STEP 5Y = 28

Finally, we have uncovered the worth of Y i beg your pardon is 28 and also that is our answer.

You can quickly calculate 21 is 75 percent that what number by using any type of regular calculator, simply enter 21 × 100 ÷ 75 and also you will gain your answer which is 28

Here is a portion Calculator come solve comparable calculations such together 21 is 75 percent that what number. You deserve to solve this type of calculation v your values by start them right into the calculator"s fields, and click "Calculate" to get the an outcome and explanation.

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percent of what number
Calculate ## Sample questions, answers, and also how to

Question: your friend has actually a bag the marbles, and also he speak you that 75 percent of the marbles space red. If there space 21 red marbles. How many marbles walk he have altogether?

How To: In this problem, we recognize that the Percent is 75, and also we are also told the the part of the marbles is red, therefore we recognize that the component is 21.

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

Part/Total = Percent/100

By utilizing a simple algebra we can re-arrange ours Percent equation prefer this:

Part × 100/Percent = Total

If we take the "Part" and multiply that by 100, and also then we divide that by the "Percent", us will acquire the "Total".

Let"s try it out on ours problem about the marbles, that"s very straightforward and it"s simply two steps! We recognize that the "Part" (red marbles) is 21.

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

21 × 100 = 2100

In step two, us take the 2100 and also divide it by the "Percent", which we are told is 75.

So, 2100 divided by 75 = 28

And that method that the total number of marbles is 28.

Question: A high college marching band has actually 21 flute players, If 75 percent the the band members beat the flute, climate how numerous members space in the band?

Answer: There space 28 members in the band.

How To: The smaller "Part" in this trouble is 21 due to the fact that there are 21 flute players and also we space told the they make up 75 percent of the band, so the "Percent" is 75.

Again, it"s the "Total" that"s absent here, and also to uncover it, we just need to follow our 2 action procedure as the vault problem.

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

21 × 100 = 2100

For action two, we division that 2100 by the "Percent", i beg your pardon is 75.

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2100 separated by 75 amounts to 28

That way that the total variety of band members is 28.

## Another action by step method

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

Step 2: first writing that as: 100% / Y = 75% / 21

Step 3: drop the portion marks to simplify your calculations: 100 / Y = 75 / 21

Step 4: main point both political parties by Y to move Y top top the best side of the equation: 100 = ( 75 / 21 ) Y

Step 5: simplifying the right side, we get: 100 = 75 Y

Step 6: dividing both political parties of the equation by 75, we will arrive in ~ 28 = Y

This pipeline us with our final answer: 21 is 75 percent of 28

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