Question: 25 is 35 percent of what number?

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Question: Your friend has a bag of marbles, and he tells you that 35 percent of the marbles are red. If there are 25 red marbles. How many marbles does he have altogether?

Answer: 71.429 marbles.

How To: In this problem, we know that the Percent is 35, and we are also told that the Part of the marbles is red, so we know that the Part is 25.

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 25.

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

25 × 100 = 2500

In step two, we take that 2500 and divide it by the "Percent", which we are told is 35.

So, 2500 divided by 35 = 71.429

And that means that the total number of marbles is 71.429.

Question: A high school marching band has 25 flute players, If 35 percent of the band members play the flute, then how many members are in the band?

Answer: There are 71.429 members in the band.

How To: The smaller "Part" in this problem is 25 since there are 25 flute players and we are told that they make up 35 percent of the band, so the "Percent" is 35.

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.

25 × 100 = 2500

For step two, we divide that 2500 by the "Percent", which is 35.

2500 divided by 35 equals 71.429

That means that the total number of band members is 71.429.

Another step by step method

Step 1: Let's assume the unknown value is Y

Step 2: First writing it as: 100% / Y = 35% / 25

Step 3: Drop the percentage marks to simplify your calculations: 100 / Y = 35 / 25

Step 4: Multiply both sides by Y to move Y on the right side of the equation: 100 = ( 35 / 25 ) Y

Step 5: Simplifying the right side, we get: 100 = 35 Y

Step 6: Dividing both sides of the equation by 35, we will arrive at 71.429 = Y

This leaves us with our final answer: 25 is 35 percent of 71.429

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