Answer:
25%
$15.50
Explanation:
Original price = $62.00
Price paid = $41.85
Original sale discount = x%
Additional discount = 10%
Saying that Margo gets the additional discount after the sale discount, means that the discount was applied to the discounted price. The discounted price was:

The original discount amount and discount rate are:

The original discount amount was 25%, resulting in a discount of $15.50