Question

Original price of a book: $18.50 Discount: 45%

Answer 1

18.5-45%=10.175 Hope this helped! :)

Answer 2

Find 45% of $18.50.

45 ÷ 100 = 0.45

18.50 × 0.45 = 8.325

18.50 - 8.325 = 10.175 ≈ 10.2

After the discount the book is $10.175 and when you round it it is $10.20.