Answer:
Discount is $2.50
Sale price is $22.50
Explanation:
You can write 10% as 0.10.
Figure out the discount.
$25 x 0.10 = $2.50
The discount is $2.50
The new sale price is the original (normal) price minus the discount.
$25 - $2.50 = $22.50 is the new sale price