I'm really bad at percentages and I'm at work and don't have time to figure it out, can anyone help asap??
2006-11-25 02:52:04 · 16 answers · asked by merryker54 2 in Science & Mathematics ➔ Mathematics
Please anyone who feels like they need to be rude, just go answer another question. I don't need critisism.
2006-11-25 03:09:08 · update #1
It is $128
very easy type this into goolge : 20% of 640 and hit enter
http://www.google.com/search?hl=en&q=20%25+of+640&btnG=Google+Search
2006-11-25 02:56:08 · answer #1 · answered by G Q 1 · 0⤊ 0⤋
Steps:
1. Change 20% to a decimal by moving the decimal point two places to the left.
Doing this we get: 0.2
2. Multiply 0.2 by $640.00
Doing this we get: $128.
What does this mean?
For example, if an item costs $640.00 and the store has a 20% deduction on such an item, then you would only pay $640.00 minus $128.00 for that item.
Got it?
Guido
2006-11-25 02:58:30 · answer #2 · answered by Anonymous · 0⤊ 0⤋
First convert 20% to decimal
Divide 20 by 100 and remove the % sign
20 / 100 = .0.2
Multiply 640 times the decimal
640 x 0.2 = 128
The answer is 20% off from $ 640.00 is $ 128.00
- - - - - - - - - - -s-
2006-11-25 03:08:00 · answer #3 · answered by SAMUEL D 7 · 0⤊ 0⤋
finding percentages are easy. all you have to do is take the percentage given, and make it into a decimal by moving hte decimal place over to the right 2 places.
so, saying that.
1) $640.00 x 20%
2)change 20% into .02 (moving the decimal point over 2 spaces)
3) $640.00 x .02= $128
4) $128 dollars is the answer
2006-11-25 02:57:19 · answer #4 · answered by Anonymous · 0⤊ 0⤋
To subtract off 20%, 1/5 of 640 = 128
640 - 128 = $512
Or you can multiply 640 x .80 (80%)
(keeping .80 of your original number
is the same as subtracting off .20)
640 x .8 = $512
2006-11-25 03:02:28 · answer #5 · answered by emilynghiem 5 · 0⤊ 0⤋
20%off of $640= 640-20/100*640
= 640-128=512
2006-11-25 03:05:44 · answer #6 · answered by Anonymous · 0⤊ 0⤋
For percentages that are multiples of 10, I find it easier to find 10% first and then multiply that answer.
Since 10% just involves moving the decimal place, it's very easy to find.
So in this case, 10% is $64. 64 times 2 is 128.
2006-11-25 03:06:30 · answer #7 · answered by Pony 2 · 0⤊ 0⤋
You need to get a calculator if you have mathematical problems.
$640.00 x 20= 128.
2006-11-25 03:02:55 · answer #8 · answered by Bethany 7 · 0⤊ 0⤋
very simple: move the decimal one place to the left, multiply by 2. like this 640.00 = 64.00 = 64 x 2 = 128.
2006-11-25 02:57:42 · answer #9 · answered by Anonymous · 1⤊ 0⤋
640 1/2 of that is 320 (50%) & 1/2 of that is 160 (25%) so I round off and would say 130. thats the quick do it in ur head or you can multiply
640
x.20
------
128
2006-11-25 03:02:11 · answer #10 · answered by regg 2 · 0⤊ 0⤋
I recently learned this in school.
1. Change the percent to a decimal (0.20)
2. Multiply 640.00 by 0.20
Then you will get your answer (a.k.a 128.00)
Tada!
2006-11-25 03:08:29 · answer #11 · answered by Vanessa<3 5 · 0⤊ 0⤋