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How do i add percentage on CASIO MS-8S.

If I try to add 10% to 100, the answer i get 111.1111111111 - My input 100+10%, i am expecting 110, calculator gives me 111.1111111111

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Merryn Phillips

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Whats the point of the % button then?

Posted on Feb 09, 2015


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Matt Hughes

  • 122 Answers

SOURCE: Casio seem to have a problem with the percentage key

The issue is the fact that you are adding the %. You need to Multiply it by 1.1 instead of trying to add 10%. This is a wonky equation anyway, because your not specifying what you want to add 10% of. This is why you are getting a weird answer.

Posted on Jun 20, 2009



  • 1 Answer

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


SOURCE: calculating percentages

how can i change or fix an exchange rate in Xasio JF - 100TE calculator

Posted on Jul 10, 2008


  • 1 Answer

SOURCE: my calculator will not let me add or subtract percentages.

It would appear most Casio’s have a similar problem I believe this could be a fault in their programming and am awaiting reply from Casio and some of its distribution outlets.

Posted on Jun 20, 2009


  • 8081 Answers

SOURCE: Hi, I have a Casio calculator fx-991MS giving me wrong answers!

I am only looking for a plausible cause of the error, because I do not believe your calculator can make such a mistake. I think you accidentally activated the Exponential display format and did not pay attention to the small, raised -03 that came at the end of the number displayed. It is a common mistake for those not very familiar with Scientific or exponential notation.

Let us try to reset your calculator to the normal (floating point) format.
Press the [MODE] key a number of times until you reach a screen that has FIX, SCI, NORM and under each one a number (FIX 1, SCI 2), Norm 3). To have the number of decimal place you gave in your result (4 decimal digits), you press 1 to select Fix then 4.

Be aware that scientific calculators usually stop displaying results in floating point format ( 0.0000045 ) if the number is smaller then 0.001. So basically, 0.00099 will be displayed as 9.90-04, -04 being raised above the level, and in smaller size.

Hope it helps.

Posted on Oct 02, 2009

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i am giving the key input with an example..
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so how much at 30...

On 991MS,
Go in Reg mode, for doing that : press Menu,Menu, 2

Enter the values as follows,

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(Note: there is a "," in between 0 and 300)

then enter the following,
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good luck!!

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