Yes 2/4 is less than 2/3 :) I hope this helps
Answer: The cat is 2/3 times as heavy as the dog.
Step-by-step explanation:
The weight of Priya's cat =
Now, 
The weight of her dog =

Let cat is n times heavy as dog.
Then 

Hence, The cat is 2/3 times as heavy as the dog.
132 degrees
37 degrees
169 degrees
180 degrees
49 divided by 3 = 16.33
Each sibling has about 16 rare coins.
I dont know if this could help you but if you can please try to answer those two that I didn't complete so you could have an idea on what there relationships are and things like that.