HP (Hewlett-Packard) 12C 用户手册

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268  Appendix G: United Kingdom Calculations 
 
File name: hp 12c pt_user's guide_English_HDPMF123E27  Page: 268 of 275   
Printed Date: 2005/8/1   
Dimension: 14.8 cm x 21 cm 
 
Annual Percentage Rate (APR) Calculations 
In the United Kingdom, the calculation of the Annual Percentage Rate of Charge 
(APR) in accordance with the United Kingdom Consumer Credit Act (1974) differs 
from the calculation of the APR in the United States. Unlike the practice in the 
United States, where the APR can be calculated by multiplying the periodic interest 
rate by the number of periods per year, in the United Kingdom the APR is 
calculated by converting the periodic interest rate to the “effective annual rate,” 
then rounding the result to one decimal place. With the periodic interest rate in the 
display and in the i register and the payment mode set to End, the effective annual 
rate can be calculated by pressing ÞP, then keying in the number of 
compounding periods per year and pressing w0$M. Pressing f1 will 
then display the rounded APR. 
Bond Calculations 
Solutions for the price and yield to maturity of United Kingdom bonds are not 
included in this handbook. Actual practice differs according to the type of bond; 
variations such as cumulative and ex-dividend pricing, simple or compound interest 
discounting, etc., may be encountered. 
Application Notes covering such situations may be available in the United 
Kingdom; check with your local authorized Hewlett-Packard dealer.