Chain Calculations In Alg Mode; Percentage Functions - HP 12C Platinum Owner's Handbook Manual

176 Appendix B: Algebraic Mode (ALG)

Chain Calculations in ALG mode

To do a chain calculation, you don't need to press } after each operation, but
only at the very end.
For instance, to calculate
750 § 12 } z 360 } or
750 § 12 z 360 }
In the second case, the z key acts like the } key by displaying the result of
750 × 12.
Here's a longer chain calculation:
This calculation can be written as: 456 – 75 ÷ 18.5 × 68 ÷ 1.9. Watch what hap-
pens in the display as you key it in:
Keystrokes (ALG mode)
456-75z
18.5§
68z
1.9}

Percentage Functions

In most cases, b divides a number by 100.
The one exception is when a plus or minus sign precedes the number.
For instance, 25 b results in 0.25.
To find 25% of 200, press: 200 § 25 b}. (Result is 50.00.)
You can calculate a net amount all in one calculation:
For instance, to decrease 200 by 25%, just enter 200-25b}. (Result is
150.00.)
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)
1250+7b
}
×
750 12
you can enter either:
-------------------- -
360
456 75 – 68
×
-------------------- - ------ -
18.5 1.9
Display
381.00
20.59
1,400.43
737.07
Display
Interest on the loan is $87.50.
87.50
You owe this amount at the end of
1337.50
one year.