Take off decimal on my calculator - Casio FX-300MS Calculator

Here is a sample of the percentage calculations that the calculator can perform. You will not see among them the conversion from decimals to percentages.
To convert from decimals to percents move the decimal mark 2 places to the right and append the % sign.
To convert from percents to decimals, move the decimal mark 2 places to the left.

If You Want to Convert Decimal to Fraction for your maths class. These types of calculations are we can learn on 5th to 10th Standards. If you are studying in 5th to 10th class and you don't know how to convert your decimal number to fraction number. You want to learn about decimals and fractions.

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To convert a fraction to a decimal or a decimal to fraction you use the [a b/c] key.
While converting a fraction to a decimal number is always possible, converting a decimal to a fraction may, at times, not be possible.

Above the feed button is an area for controlling the decimal placement. By leaving the slider on +, you have to manually put the decimal in.
0 - Means no decimal will be placed.
1 - Put it one place to the end. Ex: 4132.5
2 - Will make it read 413.25
3 - Will be 41.325

And so on.

pressing the tab button displays the number of decimal places 0, 2, 3, 4, A, F on the bottom of the screen.

Press 2ndF TAB and then a digit specifying the number of digits you want after the decimal point.

Hi,

P12c display from Comma to Point This document describes how to change the display of the decimal point on the HP 12C (HP12C) Calculator from a comma (commas) back to a decimal point.
Instructions

1. Turn off the calculator.
2. Hold down the decimal point.
3. Continue to hold the decimal point key, while turning on the calculator.

The comma should change back to a decimal point.
Explanation The comma is the European equivalent of the decimal point.
This procedure is also applicable to HP12CP (Hewlett-Packard 12c Platinum) and HP12CPA (Hewlett-Packard 12c Platinum 25th Anniversary Edition).

Let me know, if needed further assistance.

Hope i helped you.

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To force a fraction to be displayed as a decimal number put a decimal mark at the end of the numerator OR the denominator. Fraction/decimal result is always decimal.

From HP12c FAQ:
This document describes how to change the display of the decimal point on the HP 12C Calculator from a comma back to a decimal point. Instructions

1. Turn off the calculator.
2. Hold down the decimal point.
3. Continue to hold the decimal point key, while turning on the calculator.

The comma should change back to a decimal point. Explanation The comma is the European equivalent of the decimal point. *
For more information about your machine (data sheets, learning modules, manuals, FAQs, etc), check this link:
http://h10010.www1.hp.com/wwpc/us/en/sm/WF05a/215348-215348-64232-20036-215349-33525.html

Turn the calculator off, then press and hold down the .(decimal key) while you press the on button. Doing so again sets the calculator to use the original digit separators in the display