You have to convert your fractions so that they are all the same. In this case, we can use sixths. So two and three sixths (two and a half), minus one and four sixths (one and two thirds), would equal five sixths. Another way to do it is to convert the whole numbers to sixths as well. Fifteen sixths minus ten sixths equals five sixths.
6/7
2 minus five sixths is 1 1/6.
three and five sixths
Five and one third.
2
It is: 1 -5/6 = 1/6
3 and 1/6
1/2
29/6
5 minus 5 sixths is 4 and one sixth.
Nine and five-ninths minus six and five-sixths = 49/18 or 213/18