For fraction: 1 / 12 is: 27 720 : 12 = (23 * 32 * 5 * 7 * 11) : 12 = 2 310
For fraction: 1 / 20 is: 27 720 : 20 = (23 * 32 * 5 * 7 * 11) : 20 = 1 386
For fraction: 1 / 30 is: 27 720 : 30 = (23 * 32 * 5 * 7 * 11) : 30 = 924
For fraction: 1 / 42 is: 27 720 : 42 = (23 * 32 * 5 * 7 * 11) : 42 = 660
For fraction: 1 / 56 is: 27 720 : 56 = (23 * 32 * 5 * 7 * 11) : 56 = 495
For fraction: 1 / 72 is: 27 720 : 72 = (23 * 32 * 5 * 7 * 11) : 72 = 385