Appendix B: Algebraic Mode (ALG) 241

Percentage Functions

In most cases, bdivides a number by 100.

The one exception is when a plus or minus sign precedes the number. For instance, 25 bresults in 0.25.

To find 25% of 200, press: 200 §25 b}. (Result is 50.) You can also calculate a net amount all in one calculation:

For instance, to decrease 200 by 25%, just enter 200-25b}. (Result is 150.)

Example: You borrow $1,250 from a relative, and agree to repay the loan in a year with 7% simple interest. How much money will you owe?

Keystrokes (ALG mode)

OO

1250+7b

}

Display

0.00Clears any pending operations.

87.50Interest on the loan is $87.50.

1,337.50 You owe this amount at the end of one year.

Percent Difference

To find the percent difference between two numbers:

1.Key in the base number.

2.Press }to separate the other number from the base number.

3.Key in the other number.

4.Press à.

Example: Yesterday your stock fell from 35.5 to 31.25 per share. What is the percent change?

Keystrokes (ALG mode)

OO

35.5}

31.25

à

Display

0.00Clears any pending operations.

35.50Keys in the base number and separates it from the other number.

31.25Keys in the other number.

-11.97Nearly a 12% decrease.

File name: hp 12c pt_user's guide_English_HDPMF123E27

Page: 241 of 275

Printed Date: 2005/8/1

Dimension: 14.8 cm x 21 cm