Subtraction using 2 data sets

[sbatra116]

the solution has to be easily but can't get it. 

Dataset 1 

Column ID	Quantity
1	10
2	14

dataset 2 

Subtract_Column

1.00

dataset 2 will always have one column. 

Need to substract that number from dataset1.

output :

Column ID	Quantity
1	9
2	13

[DataNath · Accepted solution]

Hey @sbatra116, you'll just want to use the Append Fields tool for this, which will place an instance of your [Subtract_Column] next to all rows of your main dataset, then you can simply apply a formula: