1/2, folded in half along one side, and then folded in half, divided into four small rectangles, one side of which is consistent with the original rectangle, and the other side is1/4 on the other side of the original rectangle;

3. Fold in half along one side and then fold in half along the other side, and the result is four rectangles, the length and width of which are half of the length and width of the original rectangle;

4. Fold in half along two diagonal lines to get four triangles, which have the same shape but the same area.