Answer:
-43/60
Step-by-step explanation:
Establish a common denominator (60)
-5/12->12*5= 60
-3/10->10*6=60
Multiply numerators
-5/12->5*5=25
-3/10-3*6=18
-25/60-18/60
subrtact numerators
-25-18
------------
60
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