how do you figure out percent off. like the math to it...?

Question

example if I had 14.99 how do u take 20 percent off what is the math to it..?

Answer 1

To do it in your head; like if you are shopping and do not have a calculator do this:

10% is easy; 1.49. You can round up and then you get 1.50.

You need double that; 20% so double 1.50 and you get 3.00. Subract 3.00 from 14.99 and you have an approximate answer.

If it needs to be exact then subtract 2.98 (without having rounded it to 3.00).

Hope this helps. My mom taught me this when I was young and shopping and I can figure it in my head quickly after all these years of practice!

Answer 2

The math would be the base number (in this case 14.99) multipled by the 1 minus the percentage you're dealing with (in this case .20).

In this case, it would be 14.99 * .80 = 11.992

Another way is to compute 20% of the base number and minus it (a much easier way to go if you're doing the math in your head). The best way to do this is in 10% chunks.

In order to figure out 10% of a number, you move the decimal place 1 to the left. In this case, 10% of 14.99 is 1.499, or 1.5 if you're rounding or doing approximates. 1.5 * 2 (since you're looking for 20%) is 3. 14.99 - 3 is 11.99, which is essentially the same number as we got with the calculator only rounded to 2 decimal places.

Good luck!

Answer 3

Multiply $14.99 by .20. (14.99 X .20) That is the decimal expression of 20 percent. You'll get 20 percent of it.

Take the number you get and subtract it from $14.99. That's what's left.

Also, remember that 20 is one fifth of 100. So basically they're asking you for one fifth of $14.99. So divide it by 5! (That's how I figure out a 20 percent tip!)

Answer 4

Multiply:

Price x .20

For pricing, estimate price and percentage (15 x 1/5 = 15/5 = 3)
$3 is the discount amount to be subtracted from the full price:
$15 - $3 = $12

OR,

Change the percentage to 1 - discount percentage
1-.20 = .80

Now, multiply price x .8 to get discounted price.

$15(.80) = $15(.8) = $12

Answer 5

Move the decimal on the percentage over to the left two spots and then multiply that by the other value.

For your example, multiply 14.99 x .20 = 2.998

Round the percentage to the nearest hundredth (penny). So 2.998 would round up to 3.00.

Then just subtract 14.99 - 3 = 11.99

Answer 6

First take 14.99 and multiply that by .20 (which is 20 percent) Then take that total amount and subtract that from 14.99, which comes to about 11.99 or 12 dollars rounded out.

Answer 7

Just do like I do: 10% is easy. If it is 15% then it's 10% plus half of 10%. 20% of 14.99 I am thinking like a waitress , 3 something

Answer 8

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Good luck!

Answer 9

you take your twenty percent by decimal
----using a calculator,,,punch in .2 (that's your twenty percent)
now multiply it by the price. the answer will be how much money you should subtract from the original price.
sounds confusing. but it's really easy

Answer 10

On a calculator.... 14.99 X 20 %=2.998