21 can be divided by 7 but 18 cant
18
-39
4.8571
6/7 = 18/21 + 1/21 = 19/21
18 / 6/7 = 21
Three is the lowest common denominator. 21 divided by 3 = 7 54 divided by 3 = 18 21/54 = 7/18
1.1667
18 x 35 = 630 630 / 30 = 21 So the answer is 21.
Well, the highest common factor of the numerator and the denominator is 3. 21 divided by 3 is 7 and 54 divided by 3 is 18. So the answer is:7/18
There is no need to simplify this, it is only a sum. 21 + (10/2) - 18 = 8
12x21/18+29-11= 32