How to find the volume using fractions?Method 1: Find the volume of 1 cube ¼ x ¼ x ¼ = 1/64 u³, then multiply this by the total number of cubes (length, width, and height) in the prism. So, if the prism has a length of 4, width of 4, and a height of 4, the total number of cubes needed would be 64. 1/64 x 64 = 1 cm³.