wikiHow Calculating Interest Answers 1. The total interest owed after 3 years is $750 (i.e. $5,000 x 0.05 x 3). 2. The total interest charged is $4,665.32. 3. The total interest earned after 2 years is $61.68. 4. The total interest earned at maturity is $300 (i.e. $1,000 x 0.06 x 5). 5. The interest charged after 6 months is $45 (i.e. $2,000 x 0.015 x 6). 6. The total interest charged is $2,882.26. 7. The total amount earned at maturity is $14,973.33. 8. The total interest charged is $143,739.64. 9. The total interest earned at maturity is $195.27. 10. The total interest earned is $859.28. 11. The total interest charged is $7,812.68. 12. The total amount earned at maturity is $3,622.73. 13. The total interest charged is $1,294.91. 14. The total amount earned after 7 years is $2,066.96. 15. The interest earned after 2 years is $76.69. Page