Marlon has a gift card for $200. He spent half of it on Monday and one-fourth of the remainder on Tuesday. How much was left on his gift card? Let's think first. Chain of thought:
Since Marlon spent half of the gift card, then half of it which is $200 / 2 = $100 remained on Monday. Then on Tuesday, he spent $100 / 4 = $25. Therefore, he has $100 - $25 = $75 left in his gift card.
Therefore, the answer is 75.