HP 40gs - Manual (Page 170)

13-16 Using mathematical functions
Example
9 MOD 4 returns 1
% x percent of y; that is, x/100*y.
% (x, y)
Example
% (20,50) returns 10
%CHANGE Percent change from x to y, that is, 100(y–x)/x.
% CHANGE(x, y)
Example
% CHANGE(20,50) returns 150
%TOTAL Percent total : (100) y/x. What percentage of x, is y.
% TOTAL(x, y)
Example
% TOTAL(20,50) returns 250
RAD→DEG Radians to degrees. Converts value from radians to
degrees.
RAD→DEG (value)
Example
RAD→DEG(π) returns 180
ROUND Rounds value to decimal places. Accepts complex
numbers.
ROUND(value, places)
Round can also round to a number of significant digits as
showed in example 2.
Examples
ROUND(7.8676,2) returns 7.87
ROUND (0.0036757,-3) returns 0.00368
SIGN Sign of value. If positive, the result is 1. If negative, –1. If
zero, result is zero. For a complex number, this is the unit
vector in the direction of the number.
SIGN(value)
SIGN((x, y))
hp40g+.book Page 16 Friday, December 9, 2005 1:03 AM