Answer: $225. If the price of the coat was $250 last year, then the coat costs $225 this year.
Explanation:
Since the coat costed $250 last year, it is 100% of its original.
Now that it has decreased 10%, it is 100%-10%=90% of its original price.
The new price of the coat will be (90% ÷ 100%) × $250 = $225