Dear Friend,
My answer is also to analyze the consolidated financial statement. I can further explain it for better understand.
Take X as the company, you consider and Y as its subsidiary. Imagine there are current assets worth 500,000 and 400,000 which the 1st is belong to X and 2nd is belonged to Y. It is shown clearly at below.
______________ Asset______ Value
X_____________01_______ 500000
Y_____________02_______ 400000
Next imagine there are two current liabilities worth 250,0000 and 800,000.
______________ Liability______Value
X______________01________250,000
Y _____________ 02________800,000
Now I add them together and create the consolidated values.
Total Current Assets = 900,000
Total Current Liabilities = 1,050,000
Lets we calculate the Quick Acid Ratio. First we take only the assets and liabilities belonged only to X.
=Current Assets/Current Liabilities
=500,000/250,000
=2 (Decision: Strong. Company has sufficient liquid assets to cover its current liabilities)
Second we take the consolidated values.
=Current Assets/Current Liabilities
=900,000/1,050,000
=0.86 (Decision: Weak. The company doesn't have sufficient liquid assets to cover its current liabilities)
I suppose now you can understand the reason. Consolidated values (Group) provide you the most correct view. For further info, post it under the topic.