HP 40gs hp 40gs_user's guide_English_E_HDPMSG40E07A.pdf - Page 170
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hp40g+.book Page 16 Friday, December 9, 2005 1:03 AM % %CHANGE %TOTAL RAD→DEG ROUND SIGN 13-16 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(π) 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 7.87 ROUND (0.0036757,-3) returns 0.00368 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)) Using mathematical functions