Show:
adding factions
subtracting factions
100

1+ 3/5

4/5








100

3/5-2/5

1/5

200

1/2 + 3/4

1 1/4

200

7/8-3/8

1/2

300

2+5/6

1 1/6

300

5/10-3/10

2/10

400

3+7/8

1 2/8


400

1-1 3/6

3/6