Final answer:
To find the original price, set up an equation using the fact that $450 is 75% of the original price, then solve for the original price.
Step-by-step explanation:
To find the original price, we need to determine what amount represents 100% of the original price. Since Kay paid $450, which is 75% of the original price, we can set up an equation to solve for the original price.
Let x be the original price. Since 75% can be written as the decimal 0.75, we can set up the equation:
x * 0.75 = $450
To solve for x, divide both sides of the equation by 0.75:
x = $450 / 0.75
x = $600
Therefore, the original price was $600.