Answer:

Step-by-step explanation:
I have attached the explanation above. hopefully this will help
Find the Least Common Denominator (LCD) which is 28.
-1/4 (7) = -7/28
-3/7 (4) = -12/28
-7 - 12 = -19
-19/28
Simplify if you can.
Answer:
product
Step-by-step explanation: