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Option
19. MATH..
returns the user to the MTH menu. The remaining
functions are grouped into six different groups described below.
If system flag 117 is set to
SOFT menus
, the
REAL
functions menu will look like
this (ALG mode used, the same soft menu keys will be available in RPN
mode):
The very last option,
)@@MTH@
, returns the user to the
MTH
menu.
Percentage functions
These functions are used to calculate percentages and related values as
follows:
% (y,x) : calculates the x percentage of y
%CH(y,x) : calculates 100(y-x)/x, i.e., the percentage change, the
difference between two numbers.
%T(y,x) : calculates 100 x/y i.e., the percentage total, the portion
that one number (x) is of another (y).
These functions require two arguments, we illustrate the calculation of
%T(15,45)
, i.e., calculation 15% of 45, next. We assume that the calculator
is set to ALG mode, and that system flag 117 is set to
CHOOSE boxes
. The
procedure is as follows:
„´
Select
MTH
menu
5
@@OK@@
Select the
5. REAL..
menu
3
@@OK@@
Select the
5. %T
function
15
Enter first argument
‚í
Enter a comma to separate arguments
45
Enter second argument
`
Calculate
function
