The largest number that will divide into 28 42 and 70 with no remainder is 14.
11.6667
Because 8 does not divide evenly into 70 with no remainder.
8.8286
57.1429
9.8571
23.3333
11.6667
8.75
Well, darling, 20 goes into 70 a total of 3 times with a remainder of 10. Simple math, really. Just divide 70 by 20 and you'll get your answer. Hope that clears things up for you, honey.
7 divide by 16 with a remainder = 0.4375
8 divide by 51 with a remainder = 0.1568627450980392