Paul bought 4 non-fiction books. The original price of each non-fiction book was $16. He was given 15% discount on the first non-fiction book and 25% discount on the rest of the non-fiction books. How much did he pay for the 4 non-fiction books altogether?
Cost of the first non-fiction book after 15% discount in percent
= 100% - 15%
= 85%
Cost of the first non-fiction book after discount
= 85% x 16
=
85100 x 16
= $13.60
Number of the rest of the non-fiction books that enjoyed 25% discount
= 4 - 1
= 3
Cost of each of the rest of the 3 non-fiction books after 25% discount in percent
= 100% - 25%
= 75%
Cost of each of the rest of the 3 non-fiction books
= 75% x 16
=
75100 x 16
= $12
Cost of the rest of the 3 non-fiction books that enjoyed 25% discount
= 3 x 12
= $36
Total cost for the 4 non-fiction books
= 13.60 + 36
= $49.60
Answer(s): $49.60