Question about Casio MS-80TV Scientific Calculator

Percentage Key on Casio MS-8TV

I want to use the percentage key just for working out percentages and not for tax reasons.

e.g. 100 divided by 10% (to simplify matters)

Every time I try to do this I get a wierd answer.

Is the percentage key JUST for working out tax or can it be used as a simple percentage key?

HELP !!!!

Posted by on

• beckyt322 Apr 04, 2009

when doing acalculation such as 100 x 10% , i get 111.111etc...

i would like to just be able to use the percentage key properly.

• Anonymous May 14, 2009

Casio MS-8TV if i input 100 - 40% (actual key press) then the answer i get is 150. If i do 100 + 40% then i get 166.666. Its nothing to do with the tax button, and i have pressed the AC first. Just trying to do a simple % calculation.

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Posted on Jan 02, 2017

SOURCE: Casio calculator MS-8TV

you hold your set % button down for three seconds until set shows again, then hit tax rate button it shows your tax rate, change your tax rate then hit set your tax rate should be set.

cliff notes:
hold set% button
hit tax+ button
change the desired %
hit set done

Posted on Jan 11, 2008

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Jan 19, 2016 | Computers & Internet

When I try to make 100 + 10% answer is 111.11111... and not 110, How do i correct it?

best way to calculate percentages quickly is to multiply base number (100) by 1.xx (where xx is the percentage desired - here it would be 10 or just 1)

100*1.1=110

Works on every calculator every time.

Mar 03, 2015 | Casio MS-10VC 10-Digit Display Calculator,...

Minus 20% of 175.00 using the percentage key

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Feb 18, 2015 | Casio MS-80S Calculator

When an amount is increases by 15% it becomes \$117300. Find rthe original amount.

Your problem is that of percentage increase.

To calculate that, this is what you do:

Initial amount (Initial amount * percentage) = Percentage increase.

Let us call the initial amount, x.

Then our parameters are:
Initial amount = x
Percentage = 15/100
Final amount = 117300

So,
x (x * 15/100) = 117300
x (15x/100) = 117300
(x/1) (15x/100) = 117300
(100x 15x)/100 = 117300
115x/100 = 117300

cross multiplying
115x * 1 = 117300 * 100
115x = 11730000

dividing both sides by 115

115x/115 = 11730000/115
x = 102000.

So the original amount was \$ 102000.

Have a wonderful day.

Jun 04, 2011 | Casio ClassPad 300 Calculator

How to calculate the percentage using the excel

Hide All
Percentages are calculated by using the following equation:
amount/total = percentage
Where percentage is in decimal format.
What do you want to do?

Calculate the amount if you know the total and percentage For example, if you purchase a computer for \$800 and there is an 8.9% sales tax, how much do you have to pay for the sales tax? In this example, you want to find 8.9% of 800.
Example The example may be easier to understand if you copy it to a blank worksheet.

1. Create a blank workbook or worksheet.
2. Select the example in the Help topic. Note Do not select the row or column headers.
Selecting an example from Help
3. Press CTRL+C.
4. In the worksheet, select cell A1, and press CTRL+V.
5. To switch between viewing the results and viewing the formulas that return the results, press CTRL+` (grave accent), or on the Formulas tab, in the Formula Auditing group, click the Show Formulas button.
1 2 A B Purchase price Sales tax (in decimal form) 800 0.089 Formula Description (Result) =A2*B2 Multiplies 800 by 0.089 to find the amount of sales tax to pay (\$71.20) Note To convert a number in percentage format to a decimal, divide it by 100. For example, the sales tax in this example (8.9) divided by 100 is .089.
Calculate the percentage if you know the total and amount For example, if you score 42 points correctly out of 50, what is the percentage of correct answers?
Example The example may be easier to understand if you copy it to a blank worksheet.
1. Create a blank workbook or worksheet.
2. Select the example in the Help topic. Note Do not select the row or column headers.
Selecting an example from Help
3. Press CTRL+C.
4. In the worksheet, select cell A1, and press CTRL+V.
5. To switch between viewing the results and viewing the formulas that return the results, press CTRL+` (grave accent), or on the Formulas tab, in the Formula Auditing group, click the Show Formulas button.

Simple way Amount/Total*100

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How change percentage (tax) rate on Casio-1100TV?

FINALLY figured out how to change the tax rate! Press AC. Press and hold the Rate Set (%) button UNTIL THE CURRENT TAX RATE IS DISPLAYED. Enter the new rate you want (such as 7.5). Press the Rate Set (%) button again.

Mar 05, 2010 | Casio Office Equipment & Supplies

My calculator will not let me add or subtract percentages.

I have a Casino MS-80S and yea, the percentage works different. As example to take 100 and subtract 10%, this is what I do: 100 X 10% - and then I get the answer 90 after I press the minus key. To add the percentage instead, 100 X 10% + will give me an answer of 110, after I press the plus key.

Apr 04, 2009 | Casio HR8TM Calculator

Percentage Key

I've been searching for the solution to this problem, as well. Apperently, there's no user's manual for this calculator. I'm going to call Casio on Monday to see if they can send me some sort of instructions. (800)962-2746 or (609)395-0154

good luck!!

Oct 25, 2007 | Casio MS-80TE Calculator

Casio calculator MS-8TV

you hold your set % button down for three seconds until set shows again, then hit tax rate button it shows your tax rate, change your tax rate then hit set your tax rate should be set.

cliff notes:
hold set% button
hit tax+ button
change the desired %
hit set done

Jun 11, 2007 | Casio MS-80TV Scientific Calculator

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