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202 Appendix F: United Kingdom Calculations
File name: hp 12c_user's guide_English_HDPMBF12E44 Page: 202 of 209
Printered Date: 2005/7/29 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 truncating the result to one decimal place. With the periodic interest rate in
the display and in the
i
register, the effective annual rate can be calculated by
keying in the number of compounding periods per year, pressing
w
, then
proceeding with step 4 of the procedure given on page 160 for converting a
nominal rate to an effective rate.
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.