This is a version of the card game "war," for students to play to practice finding the percent of a number. The game contains percent cards and whole number cards, which are used to create percent of a number problems. As in traditional "war," the player with the largest number wins the round and keeps the cards. In this game, the winner of a round will be the player with the larger answer to their percent of a number problem. I use this game with my math intervention students, as well as with my larger math classes as a center.