HP 39G User Manual page 153

MOD
%
%CHANGE
%TOTAL
RAD DEG
ROUND
Using mathematical functions
Modulo. The remainder of value1/value2.
value1 MOD value2
Example
9 MOD 4 returns 1
x percent of y; that is, x/100*y.
%(x,y)
Example
%(20,50) returns 10
Percent change from x to y, that is, 100(y–x)/x.
%CHANGE(x,y)
Example
%CHANGE(20,50) returns 150
Percent total : (100)y/x. What percentage of x is y.
%TOTAL(x,y)
Example
%TOTAL(20,50) returns 250
Radians to degrees. Converts value from radians to degrees.
RAD DEG (value)
Example
RAD DEG( ) returns 180
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 7.68
ROUND (0.0036757,-3) returns 0.00368
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