Answer:
Discount of $12.50.
Sale price is $37.50.
Explanation:
Since the dress is "Marked save 25%" this means yuo pay 75% of the $50 price. Remember, 100-25 = 75. This means you pay 0.75*50 = $37.50 and yuo got a discount of $12.50.
$50 - 37.50 = 12.50