Isabel has $204 in her piggy bank. She spent half the amount and bought a toy. She then spent half of the remaining money and bought her brother a book. How much money, in dollars, was left over? Let's be accurate as possible.
User
After buying the toy, Isabel has 204 / 2 = 102 dollars left. Isabel has 102 / 2 = 51 dollars left.
The answer: 51.
Assistant