How to Calculate Interest Semi

Divide the annual interest rate by 2 to calculate the semiannual rate. For example, if the annual interest rate equals 9.2 percent, you would divide 9.2 by 2 to find the semiannual rate to be 4.6 percent.
Divide the semiannual interest rate by 100 to covert it from a percentage to a decimal. In this example, you would divide 4.6 percent by 100 to get 0.046.
Multiply the semiannual interest rate by the balance of the account. Finishing this example, if you have a certificate of deposit that pays interest semiannually and has an account balance of $800, you would multiply $800 by 0.046 to find you will earn $36.80 in interest.
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How to Calculate How Much I Make Per Day (3 Steps)

Look at your pay stub and find out how much money you made for that pay period and how many weeks were in the pay period.
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Divide how much you made for the pay period by how many weeks were in the pay period. For example, if you made $652 in the pay period and there are two weeks in the pay period, you made $326 per week.
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Divide the amount you made per week by the amount of days you work in a week. In this case, if you made $326 in a week and you worked five days that week, you made $65.20 a day.
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