Step 2. Divide the annual interest rate expressed as a percentage by 12 to calculate the monthly interest rate expressed as a percentage. For example, if you have an annual interest rate of 7.8 percent, divide 7.8 by 12 to find the monthly interest rate is .65 percent.Related Reading: Interest Rate vs. APR Rate.anks accounts and loans often state the annual interest rate, but compound interest on a monthly basis, meaning that you need to know the monthly rate to calculate how much interest you will earn have to pay.
Major brand tennis racket manufacturers provide sizing guidelines to help you select the correct racket. If you child is 5 years old or younger and is 44 inches or shorter, a 19- or 21-inch racket is a good fit. If your child is age 6 to 8 and measures 45 to 49 inches, select a 23-inch racket.
1 Area: You must have sufficient room to build a court. 2  The standard size for a regulation double tennis court is 60 feet wide by 120 feet wide; a regulation single court should be at least 55 feet wide by 115 feet long. 3  These measurements, however, reflect only the court itself. Area: You must have sufficient room to build a court. 2  The standard size for a regulation double tennis court is 60 feet wide by 120 feet wide; a regulation single court should be at least 55 feet wide by 115 feet long. 3  These measurements, however, reflect only the court itself.