Answer:
The better deal would be website B.
Explanation:
Website A is offering $50 off so you would so $250 - $50 = $200
Website B is offering 25% off so you would do (250 · 25)/100 = $62.50
The final price would be $250 - $62.50 = $187.50
So, overall with website A you'd be saving $50 dollars, and with website B you'd be saving $62.50 dollars, with website B you'd be saving more, so therefore the answer is website B.
Hope this helps you :)