155/15-66/15=89/15.

3 1/3- 2 2/5=10/3 -12/5=50/15- 36/15=14/15

3 1/3 - 2 2/5=4/3-2/5=20/15-6/15=14/15

so the answer is 14/15.

so the answer is 14/15.