Answer:
-7/30
Step-by-step explanation:
You can use 30 as the common denominator.
7/10 = (7/10)(3/3) = 21/30
14/15 = (14/15)(2/2) = 28/30
Then the difference is ...
7/10 -14/15 = 21/30 -28/30
= (21-28)/30 = -7/30
