When i use the percentage button, it calculates at a false rate. 100+10%=111.11111 that's what the calculator tells me. how do i fix this?

I also was confused when trying to subtract percentages using the % key. I have never had a calculator function like this and I have had several other Casio models. Can confirm (X x Y% +/-) will get you the correct total "10 x 10% -" will get you 9 as an answer just as "10 x 10% +" will get you 11. Annoying to have to take an extra step, whatever Casio I'm sure you have your reasons.

On this calculator 50-10%=400 and 50+10%=55.55. What am I doing wrong?

To add or subtract a % from a number, using the % key, you first have to multiply the number by the %, then press + or –. Examples: To calculate 50 plus 10%, enter 50 x 10% (answer 5), then press + (answer 55). To calculate 50 minus 10%, enter 50 x 10% (answer 5), then press – (answer 45).

does it have a back button

yES, IT DOES Yes, it does. The BACKSPACE (ERROR CORRECTION) KEY you're looking for is the ARROW directly to the left of the TAX- key. Each press erases the last entered digit so it can then be reentered correctly.

Is this completely flat or is it curved at the top?

The display window is curved at about a 25 degree angle for ea\asy reading.

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💼 Crunch numbers like a pro—effortless, precise, and always on point!

ECO SMART POWER - Solar-powered design means no battery worries and sustainable use
COMPACT YET POWERFUL - Sleek brush nickel finish fits perfectly on any desk, blending style with function
MASTER YOUR FINANCES - Integrated tax and currency calculation tools to streamline your budgeting
SEE EVERY DIGIT CLEARLY - Large 8-digit LCD display with 3.25-inch screen for effortless readability
SMOOTH TYPING EXPERIENCE - Key rollover technology ensures fast, error-free input during busy work sessions

The Casio MS-80B is a solar-powered desktop calculator featuring a large 8-digit LCD display, built-in tax and currency calculation tools, and key rollover technology. Its compact design with a stylish brush nickel finish makes it ideal for home, office, or everyday math tasks.

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Number of Batteries	1 Product Specific batteries required.
Display Type	LCD
Power Source	Solar Powered
Screen Size	3.25
Calculator Type	Standard Function
Item Dimensions L x W	5.79"L x 4.06"W
Material	Plastic
Color	Brush Nickel

Casio MS-80B Calculator – Desktop Calculator with Tax & Currency Tools | General Purpose | Large Display | Ideal for Home, Office & Everyday Math

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