4 1/7 - 2 6/7
4 1/7 - 2 6/7 use the "borrowing concept" here....note: 1 = 7/7.....so we have
4 1/7 = 3 + 1 + 1/7 = 3 + 7/7 + 1/7 = 3 + 8/7
And now we have
3 + 8/7 - (2 + 6/7) =
3 - 2 + 8/7 - 6/7 =
1 + 2/7
