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$20,000 invested at 3% for 30 years

Future value

$48,545

Interest earned

$28,545

Total growth

142.726%

Investing $20,000 at 3% compounded annually for 30 years grows to $48,545. That's $28,545 of compound interest earned on your original $20,000.

FV = $20,000 × (1 + 3%)^30

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