Well I do not have 99 magic nor do I have 72 magic, the best way is if your a member to use your best member spell, if not use high alch. I have experience with magic as mine is 47.
99 + 99 + 88 + 88 + 72 + 72 = 518
Assuming you had 99 Hitpoints, and only had 1 Prayer, Summoning, Magic, and Ranged, you would have a combat level of 96.
The LCM is 792.
The common factors of 72 and 99 are 1, 3, and 9
72/99 x 100 = 72.72 recurring (that is, 72.727272...) percent.
24^72 = 2.3725174e+99
You have to train the Magic skill. That's all.
It is 72, the middle number when they are arranged in order.
99 / 72 = 1 r 27 72 / 27 = 2 r 18 27 / 18 = 1 r 9 18 / 9 = 2 r 0 GCF of 72 and 99 is 9
The factors of 72 are: 1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 36, 72 The factors of 99 are: 1, 3, 9, 11, 33, 99
99
99/72 - 64/72 = 35/72