Question about Casio DF320TM Scientific Calculator

# Why calculator wont -minus a % amount properly it just doubles the amount. Eample 100 - 10% = 900 ???????????? Please help me change this

Posted by on

• Level 2:

An expert who has achieved level 2 by getting 100 points

MVP:

An expert that gotĀ 5 achievements.

Governor:

An expert whose answer gotĀ voted for 20 times.

Scholar:

An expert who has written 20 answers of more than 400 characters.

• Expert

You are actually telling the calc to do 100-10 then convert it to percent. so 100-10 is 90 and what percent is this would be 9000%, but if you actually mean 900% then you have to have a switch turned on that makes it advance the decimal place on the 100 and not the 10%. i would read the users manual in detail, not just about the % but everything or maybe start changing the swtiches and see where you end up.

Posted on Jul 21, 2010

Hi,
A 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
The service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
Good luck!

Posted on Jan 02, 2017

×

my-video-file.mp4

×

## Related Questions:

### Minus sign display problem

Calculators have two similar signs: the regular minus sign for subtraction, and the negation (change sign) sign. When applied, the latter changes the sign of the quantity to which it is applied. The minus sign - for subtraction is on the central line, the negation sign is smaller and somewhat raised above the center line.
The change sign key may be marked (-) , (+/-), or +/-

Nov 08, 2013 | HP 35s Scientific Calculator

Minus and change-sign are two completely different things. Minus is used to subtract one number from another. When you press minus when the input line is empty, your telling the calculator to subtract. The only way it can subtract the number you're about to put in is to subtract it from something else, and that something else is the previous answer, hence the "Ans."

If you want to input a negative number, use the change-sign key. If you want to subtract one number from another number, use the minus key.

Try pressing the plus key when the input line is empty. You'll get Ans+ in this case as well, The same with multiply and divide, among others, and for the same reason.

Sep 23, 2013 | Texas Instruments TI-84 Plus Calculator

### How do I use the percentage function on this calculator? Such as subtracting 75% off of an amount

Hi,

You can use either of this 2 equations.

ex: 75% off of 20

Equation 1: 20 minus (-) 75% = 5

Equation 2: (20*0.75) = 15 then press Ans key
20 - Ans = 5

Hope this helps.

Jun 16, 2011 | Monroe Classic Calculator

### What am i doing wrong i cant get this to compile /* * Converts an amount measured in cups to milliliters. * 1 cup = 236.518538 milliliter * * cups - amount measured in cups * * returns amount...

Your function as written will always return -1. You need to make the calculation to convert cups to milliliters:

double convertCupsToMilliliter(double cups) {return cups * 236.518538;}

Oct 19, 2010 | Computers & Internet

### I do not have the manual. If I want to add or subtract do I put the total amount in and than hit the plus or minus key ? i.e., \$128,000 -10000. do I hit the minus before the amount or after? -1500....

128000 - 10000 then press = or chain the calculation by pressing + or - and the number you want to add or subtract.

Sep 30, 2010 | Canon P170-DH Calculator

### How do I perform multiple subtractions?

2. Press the minus (-) key
3. Enter the amount of a check
4. Press the equal (=) key. Balance will be displayed.
5. Press the minus (-) key
6. Enter the amount of a check
7. Press the equal (=) key. Balance will be displayed

Repeat steps 5 through 7 as necessary.

To enter a deposit:

5. Press the plus (+) key
6. Enter the amount of the deposit
7. Press the (=) key. Balance will be displayed

Don't press any other keys (i.e., Clear) until you have completed all checks and deposits.

Jan 28, 2010 | Canon P170-DH Calculator

### Err:syntax when I try to graph with ''-'' on ti-84 plus

Hello,
The calculator has two minus signs
1. The regular MINUS sign which is used with the subtraction operation. This operation is binary, requiring two operands (two terms). In a-b, a and be are the operands (they very specific names, but I will skip this detail).
2. The negation or change sign. This operation is called unary, requiring one operand. -a means take the negative of the number a.
These are the technicalities, in which you may not be interested. On calculators, the two operations are implemented differently, with two signs, the regular minus sign -- , and the change sign (-) usually smaller in size than the regular -- sign and raised above the main line.

Examples. Let (-) be the negation and -- the regular minus.
• If you enter (-) 12 the TI84Plus accepts it and calculates the negative of 12.
• If you enter 12 (-) 13 the TI protests with a syntax error
• If you enter 12 ( (-) 13) the calculator interprets it as 12* (-13) and calculates -156.
• If you enter --12, the calculator displays Ans--12, where Ans is the last result calculated. If Ans happens to be 0, the new result is obviously the one you are expecting. But if Ans holds a non zero value, this is incorrect.
Suppose you have to calculate X^(-2)*X^(-1/3)
You can enter it exactly as it is written above. In this case, you must use the change sign (-) in both factors.
You can also decide to use the power rules and enter the expression as X^( -2 --1/3). In this case the first minus is the negation and the second is the regular minus.

I could go on with a few more examples, but that will take us away from your present concern.

In short.
1. If the minus sign is the leftmost (first) symbol in your function (after the Y1=) you should use the negation. Any subsequent minus should be the regular minus --
2. If the minus sign is the first symbol in an exponent, you must use the negation. Any subsequent minus in the expression of an exponent should be the regular minus --
I hope it did not bore you death with details you do not care to know about. I do hope that it will help you prevent this type of syntax errors.

Do not forget to rate the solution

Dec 13, 2009 | Texas Instruments TI-84 Plus Silver...

Hello,
Calculators usually have two minuses, the regular minus sign and the change sign sometimes labeled (-) or (+/-). The latter is not meant to effect a subtraction, but to take the negative of the number you just entered. Big difference, would you say, but the syntax is different.
Ex: 15 - 7 is a subtraction with result 8
10 (-) displays -10 on the screen.
In some calculators the change sign is smaller than the regular minus, and is raised above the main line.
Hope it helps.

Oct 05, 2009 | Victor 1208 Calculator

### Ti-83 plus

try changing the back up battery also. This generally helps. The next time you change your batteries, change them one at a time. don't take them all out at once. This won't happen if you do it like that.

Jan 19, 2008 | Texas Instruments TI-83 Plus Silver...

## Open Questions:

#### Related Topics:

80 people viewed this question

Level 3 Expert

Level 3 Expert

Level 3 Expert