Task #$03$: Using the retail.inventory table, pull the current stock percentage out of the future stock level for the product with a product$\_$id $=21.$

Want a hint?

The percentage can be calculated by dividing the current inventory level by the current inventory level plus the total number of items shipping in the future. Remember your math and the order of operations.

Want another hint?

You will need to multiply one of the fields in your calculation by $1\mathrm{.}00$ to allow there to be decimal values in your answer. Try running your query without doing so to see what result you get.