Students tried a variety of mathematical procedures to come up with a reasonable answer. They tried dividing: 30 went into 80 twice with 20 left over, but 20 did not make sense. They tried calculating the decimal, but 30/80 = .375 and you can not play part of a game. Students were creative in their choices of operations and demonstrated an understanding of what would be considered a reasonable answer: 30% was a little greater than 25% ... given that 25% was the “same” as dividing by four, students knew that a reasonable answer had to be a little greater than 20 … but how much greater? Many students, when they came up with a number, would try to check it to see if the same procedure, when used with the other percentages, yielded a total of 80 games. Repeatedly, it did not. As she walked around the room, Ms. Perry was stunned. She was impressed with students’ focus on reasonableness, their rechecking of possible solutions, and their perseverance. However, she was shocked at their inability to solve the problem. She repeatedly commented that students had already been tested and had received a C+ or higher. Interviews with students revealed the root of the problem: Context mattered.