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.
The best size tennis racket for your child is based on arm length. Children of the same age and height typically have similar arm lengths, so rackets are often grouped using this information. To make sure the racket fits perfectly, you can do so in a few easy steps.tart with the racket recommended for your child's age or height. Have the child stand up straight. Place the handle side of the racket into the groove where the shoulder joint meets the collar bone. Hold the racket so that it points out in front of the child horizontally.