Tight-fit Arrow Sudoku Instructions

Rules: The challenge is to fill in the numbers 1 to n in the grid, subject to the following rules:

1. Insert numbers between 1 and n so that there is 1 number in each cell without a slash and 2 numbers in each cell with a slash. 
2. In cells with a slash, the smaller number always goes above the larger number.
3. Each area contains the numbers 1 to n.
4. The sum of the numbers along the arrow equals the number in the circled cell. Numbers in cells with a slash are treated as fractions.