Answer:
11.11%
Step-by-step explanation:
Calculation for the common-size balance sheet value of inventory
First step is to find the Total assets 
Using this formula 
Total Assets=Net fixed assets +Current assets
Let plug in the formula 
Total assets = $518 + 274 = $792
 
Second step is to find the Common -size value of inventory 
Using this formula 
Common -size value of inventory = Inventory/ Total assets
Let plug in the formula 
Common-size value of inventory = $88/$792
 = .1111, or 11.11%
Therefore the Common-size value of inventory will be 11.11%