The price paid was 437 and this was 24% less than the original price. That means that the amount paid, which is $437 represents 76% of the original price.
If the original price is x, then we have;

This means the original price was $575
Note how we arrived at the equation
The original price was 100% while the sales price was 76%.
Therefore, 437 over the original price, is the same as 76% over 100%