Print them out and laminate them to have a set to use in class.
Remember the classic card game, "Spoons"? Use these cards to review fraction, decimal, percent equivalancies while playing a fun card game. In Spoons, a group of students (usually 4) are delt 3 cards [in the original game it is 4 cards because there are 4 suits]. The point of the game is to get 3 of a kind. First - you need spoons (One less than the number of students playing). If 4 students are playing, you will need 3 spoons. Place these spoons in the center of the group. A 'dealer' starts by taking a card from the draw pile. If they don't need this card to complete their '3 of a kind' then they pass it to the person to their right. If that person doesn't need it, then they pass it to their right, and so on. The last person of the 4 makes a 'discard' pile if no one takes the card. This process continues simultaneously by each student until one student has 3 of a kind. When a student has 3 of a kind, they take a spoon. After that, the others student must quickly grab a 'spoon'. The student that doesn't have a spoon at the end of the game has lost that round.
You can also use these cards to make groups. (They would be groups of 3) Hand one to each student and have them find their partners by finding their equivalencies.