He has a total amount of $50 to spend which is the amount on his gift card.
He buys a cup of coffee for $3, so the amount of money he is left to spend would be 50-3 = $47
Since each book cost $4 and he has $47, the number of books he can buy will be 47/4 = 11.75
However, this is not our answer. The correct answer is 11
11.75 can be expressed as; (11 + 0.75)
0.75 is the fractional part. No store will