After saving $6,000 each year for 25 years at an annual interest rate of 7%, the total amount accumulated is $379,494. This total includes both the principal amount saved and the interest earned over the years. The principal amount saved can be calculated as $6,000 multiplied by 25 years, which equals $150,000. The remaining amount, $229,494, represents the interest earned on the savings. The percentage of the total amount that comes from interest can be calculated by dividing the interest earned by the total amount and multiplying by 100, resulting in approximately 60.5%. This demonstrates the significant impact of compound interest over time.