Calculate Simple Interest, Principal, Rate or Time when 3 Values are Known

By Deb Russell, About.com Guide

Calculate the amount of interest on $8700.00 when earning 3.25% per annum for three years. Once again, you can use the I = Prt formula to determine the total amount of interest earned. Check with your calculator.

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• Calculating Interest: Principal, Rate and Time are Known
• Calculating Interest Earned when Principal, Rate and Time are Known
• Calculating Interest When the Time is Given in Days
• What's the Interest on $890.00 at 12.5% for 261 Days?
• Find the Principal When you Know the Interest, Rate, and Time
• What Sum of Money Can you Invest for 300 Days at 5.5% to Earn $93.80?
• What Annual Rate of Interest Is Needed for $2100.00 to earn $122.50 in 14 Mths?

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