The interest you earn when your principal doubles is equal to the original principal amount itself. For example, if you start with a principal of $1,000 and it doubles, the total amount earned as interest is $1,000. This is because doubling means the final amount is two times the original principal, so the interest earned is the final amount minus the original principal, which equals the original principal. In summary:
- Principal = $1,000
- Amount after doubling = $2,000
- Interest earned = $2,000 - $1,000 = $1,000
Therefore, the interest earned equals your initial principal when your principal doubles. This applies regardless of the exact interest rate or time taken, assuming the principal doubles through interest accumulation.
