The usual way of calculating interest — as a percentage of the sum borrowed.
The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Examples from the Web for interest rate
UBS is the second bank to make a major settlement for interest-rate manipulation.Speed Read: The Juiciest Bits From the UBS LIBOR Settlement
December 19, 2012
Only those with money in a LIBOR-based security: a pension fund, a corporate bond, an interest-rate swap, a home loan.Bank-Bonus Culture to Blame for Barclays Scandal
July 3, 2012
Only in the mid-1990s did the central bank begin to publicly announce changes in interest-rate policy.Fed's Ben Bernanke: Trust Me!
April 27, 2011
This capital is lent at an interest-rate of from ten to twelve per cent.The Philippine Islands
Ramon Reyes Lala