>Fantasy Fractions / you HAVE to simplify the answer<

Subtracting fractions

100

14/21 - 7/15 = ?

1/5

200

63/72 - 9/81 = ?

55/72

300

99/132 - 88/121 = ?

1/44

500

72/108 - 81/116 = ?

11/348

700

132/144 - 121/132 = ?

0

Adding fractions

100

14/21 + 7/42 = ?

5/6

200

14/22 + 8/36 = ?

85/99