HP 113394 User Guide - Page 242

242 Appendix B: Algebraic Mode (ALG) Percent of Total To calculate what percentage one number is of another: 1. Calculate the total amount by adding all individual amounts. 2. Key in the number whose percentage equivalent you wish to find. 3. Press Z. Example: Last month, your company posted sales of $3.92 million in the U.S., $2.36 million in Europe, and $1.67 million in the rest of the world. What percentage of the total sales occurred in Europe? Keystrokes (ALG mode) Display OO 0.00 Clears any pending operations. 3.92+ 3.92 Keys in the first number. 2.36+ 6.28 Adds the second number. 1.67} 2.36 Z 7.95 2.36 29.69 Adds the third number to get the total. Keys in 2.36 to find out what percentage it is of the number in the display. Europe had nearly 30% of the total sales. The Power Function Pressing q calculates a power of a number, that is, yx. Like the arithmetic function +, q requires two numbers: 1. Key in the base number (which is designated by the y on the key). 2. Press q and key in the exponent (which is designated by the x on the key) 3. Press } to calculate the power. Don't forget to press OO if you are unsure if there are any pending operations. To Calculate Keystrokes (ALG mode) Display 21.4 2q1.4} 2.64 2-1.4 2q1.4Þ} 0.38 (-2)3 2Þq3} -8.00 3 2 or 21/3 2q3y} 1.26 File name: hp 12c pt_user's guide_English_HDPMF123E27 Page: 242 of 275 Printed Date: 2005/8/1 Dimension: 14.8 cm x 21 cm