Question: At a high school 15 percent of seniors went on a mission trip. There were 280 seniors. How many seniors went on the trip?
Answer: 42 seniors went on the trip.
Question: 15 percent of the children in kindergarten like Thomas the Train. If there are 280 kids in kindergarten, how many of them like Thomas?
Answer: 42 kids like Thomas the Train.
Another step by step method
Step 1: Let's solve the equation for Y by first rewriting it as: 100% / 280 = 15% / Y
Step 2: Drop the percentage marks to simplify your calculations: 100 / 280 = 15 / Y
Step 3: Multiply both sides by Y to transfer it on the left side of the equation: Y ( 100 / 280 ) = 15
Step 4: To isolate Y, multiply both sides by 280 / 100, we will have: Y = 15 ( 280 / 100 )
Step 5: Computing the right side, we get: Y = 42
This leaves us with our final answer: 15% of 280 is 42
What is 15 percent of 280?
Here we will tell you what 15 percent of 280 (15% of 280) is and then show you how we calculated it. The answer to "What is 15 percent of 280?" is:
42
15 percent of 280 is the same as 15 per hundred of 280. We can therefore make the following equation: 15/100 = X/280 To solve the equation above for X, you first switch the sides to get the X on the left side, then you multiply each side by 280, and then finally divide
the numerator by the denominator on the right side to get the answer. Here is the work to illustrate: 15/100 = X/280
X/280 = 15/100
X*280/280 = 15*280/100
X = 4200/100
X = 42 The work above shows the long way to explain how to calculate 15 percent of 280 in order to give you a foundation and better understanding of how to calculate percentage.
In the future, you could use this simplified formula: (Y * P)/100 In our problem "What is 15 percent of 280?", Y is 280 and P is 15: (280 * 15)/100 = 42 And once again you see that the answer is 42.
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Calculator | Formulas | How to Calculate
How to calculate 15 percent-off $280. How to figure out percentages off a price. Using this calculator you will find that the amount after the discount is $238. To find any discount, just use our Discount Calculator above.
Using this calculator you can find the discount value and the discounted price of an item. It is helpfull to answer questions like:
- What is 15 percent (%) off $280?
- What is $280 minus 15 percent (%) off?
- How to calculate 15 percent off $280?
- How much will you pay for an item where the original price before discount is $280 when discounted 15 percent (%)? What is the final or sale price?
- $42 is what percent off $280?
To calculate discount it is ease by using the following formulas:
(a) Amount Saved = Orig. Price x Discount % / 100
(b) Sale Price = Orig. Price - Amount Saved
Now, let's solve the questions stated above:
Replacing the given values in formula (a) we have:
Amount Saved = Original Price x Discount in Percent / 100. So,
Amount Saved = 280 x 15 / 100
Amount Saved = 4200 / 100
Amount Saved = $42 (answer).
In other words, a 15% discount for a item with original price of $280 is equal to $42 (Amount Saved).
Note that to find the amount saved, just multiply it by the percentage and divide by 100.
Using the formula (b) and replacing the given values:
Sale Price = Original Price - Amount Saved. So,
Sale Price = 280 - 42
Sale Price = $238 (answer).
This means the cost of the item to you is $238.
You will pay $238 for a item with original price of $280 when discounted 15%.
In this example, if you buy an item at $280 with 15% discount, you will pay 280 - 42 = 238 dollars.
Using the formula (b) and replacing given values:
Amount Saved = Original Price x Discount in Percent /100. So,
42 = 280 x Discount in Percent / 100
42 / 280 = Discount in Percent /100
100 x 42 / 280 = Discount in Percent
4200 / 280 = Discount in Percent, or
Discount in Percent = 15 (answer).
To find more examples, just choose one at the bottom of this page.
'Percent (%)' means 'out of one hundred':
15% = 15 'out of one hundred',
p% is read p 'percent',
15% = 15/100 = 15 ÷ 100
15% of 280 = ?
... is equivalent to multiplying them:
15% × 280 = ?
15% of 280 =
15% × 280 =
15/100 × 280 =
(15 ÷ 100) × 280 =
15 × 280 ÷ 100 =
4,200 ÷ 100 =
42
If 15% × 280 = 42 =>
Divide the number 42 by the number 280...
... And see if we get as a result: 15%
100/100 = 100 ÷ 100 = 100% = 1
Multiply a number by the fraction 100/100,
... and its value doesn't change.
n/100 = n%, for any number.
42 ÷ 280 =
0.15 =
0.15 × 100/100 =
(0.15 × 100)/100 =
15/100 =
15%
The symbols used: % percent, ÷ division, × multiplication, = the equal sign, / the fraction bar, ≈ approximately the same. Writing numbers: comma ',' - as a thousands separator, point '.' as a decimal mark.
Page 2
'Percent (%)' means 'out of one hundred':
77% = 77 'out of one hundred',
p% is read p 'percent',
77% = 77/100 = 77 ÷ 100
77% of 2,980 = ?
... is equivalent to multiplying them:
77% × 2,980 = ?
77% of 2,980 =
77% × 2,980 =
77/100 × 2,980 =
(77 ÷ 100) × 2,980 =
77 × 2,980 ÷ 100 =
229,460 ÷ 100 =
2,294.6
If 77% × 2,980 = 2,294.6 =>
Divide the number 2,294.6 by the number 2,980...
... And see if we get as a result: 77%
100/100 = 100 ÷ 100 = 100% = 1
Multiply a number by the fraction 100/100,
... and its value doesn't change.
n/100 = n%, for any number.
2,294.6 ÷ 2,980 =
0.77 =
0.77 × 100/100 =
(0.77 × 100)/100 =
77/100 =
77%
The symbols used: % percent, ÷ division, × multiplication, = the equal sign, / the fraction bar, ≈ approximately the same. Writing numbers: comma ',' - as a thousands separator, point '.' as a decimal mark.
Page 3
'Percent (%)' means 'out of one hundred':
6.3% = 6.3 'out of one hundred',
p% is read p 'percent',
6.3% = 6.3/100 = 6.3 ÷ 100
6.3% of 100 = ?
... is equivalent to multiplying them:
6.3% × 100 = ?
6.3% of 100 =
6.3% × 100 =
6.3/100 × 100 =
(6.3 ÷ 100) × 100 =
6.3 × 100 ÷ 100 =
630 ÷ 100 =
6.3
If 6.3% × 100 = 6.3 =>
Divide the number 6.3 by the number 100...
... And see if we get as a result: 6.3%
100/100 = 100 ÷ 100 = 100% = 1
Multiply a number by the fraction 100/100,
... and its value doesn't change.
n/100 = n%, for any number.
6.3 ÷ 100 =
0.063 =
0.063 × 100/100 =
(0.063 × 100)/100 =
6.3/100 =
6.3%
The symbols used: % percent, ÷ division, × multiplication, = the equal sign, / the fraction bar, ≈ approximately the same. Writing numbers: comma ',' - as a thousands separator, point '.' as a decimal mark.
Page 4
'Percent (%)' means 'out of one hundred':
0.05% = 0.05 'out of one hundred',
p% is read p 'percent',
0.05% = 0.05/100 = 0.05 ÷ 100
0.05% of 10 = ?
... is equivalent to multiplying them:
0.05% × 10 = ?
0.05% of 10 =
0.05% × 10 =
0.05/100 × 10 =
(0.05 ÷ 100) × 10 =
0.05 × 10 ÷ 100 =
0.5 ÷ 100 =
0.005 ≈
0.01
(Rounded off to max. 2 decimal places)
If 0.05% × 10 = 0.005 =>
Divide the number 0.005 by the number 10...
... And see if we get as a result: 0.05%
100/100 = 100 ÷ 100 = 100% = 1
Multiply a number by the fraction 100/100,
... and its value doesn't change.
n/100 = n%, for any number.
0.005 ÷ 10 =
0.0005 =
0.0005 × 100/100 =
(0.0005 × 100)/100 =
0.05/100 =
0.05%
The symbols used: % percent, ÷ division, × multiplication, = the equal sign, / the fraction bar, ≈ approximately the same. Writing numbers: comma ',' - as a thousands separator, point '.' as a decimal mark.
Page 5
'Percent (%)' means 'out of one hundred':
3% = 3 'out of one hundred',
p% is read p 'percent',
3% = 3/100 = 3 ÷ 100
3% of 527.5 = ?
... is equivalent to multiplying them:
3% × 527.5 = ?
3% of 527.5 =
3% × 527.5 =
3/100 × 527.5 =
(3 ÷ 100) × 527.5 =
3 × 527.5 ÷ 100 =
1,582.5 ÷ 100 =
15.825 ≈
15.83
(Rounded off to max. 2 decimal places)
If 3% × 527.5 = 15.825 =>
Divide the number 15.825 by the number 527.5...
... And see if we get as a result: 3%
100/100 = 100 ÷ 100 = 100% = 1
Multiply a number by the fraction 100/100,
... and its value doesn't change.
n/100 = n%, for any number.
15.825 ÷ 527.5 =
0.03 =
0.03 × 100/100 =
(0.03 × 100)/100 =
3/100 =
3%
The symbols used: % percent, ÷ division, × multiplication, = the equal sign, / the fraction bar, ≈ approximately the same. Writing numbers: comma ',' - as a thousands separator, point '.' as a decimal mark.