Online fraction board game to perform operations with fractions (mental maths and calculation). Calculate the proportion of a number indicated by the fraction to be applied to the number and point to a tile on the board by placing a tile on top of it. The game is in the format of the game Reversi, which involves placing more pieces of your colour than your opponent's and converting the pieces to your colour when you manage to get around your opponent's pieces in a line. Think of the best places to convert to your colour and get more. See the result interactively with the number on top of the pile of checkers. Whoever has the highest number wins the game, but be careful because the score can be reversed in the last few moves. This mathematical fractions game can be played alone against the computer, or for two players to challenge each other.