Final answer:
The original value of the house when it was purchased was $480,000, calculated by dividing the current value of $648,000 by 1.35, which represents a 35% increase in value.
Step-by-step explanation:
To determine the original purchase price of the house that has increased in value by 35% and is now worth $648,000, we can set up the original price as 100% and the increase as 35%, making the current price 135% of the original. By defining the original price as 'x', the current price is 1.35 times 'x'.
We can represent this relationship with the equation: 1.35x = $648,000.
To find the original value 'x', divide the current value by 1.35:
x = $648,000 / 1.35
x = $480,000
Therefore, the original value of the house when it was purchased was $480,000.