@paulminors ensure that right arrow is selected as the actions key in Alfred's Features > Actions > Show Actions preferences, as this can be configured to be different keys.
Also, does it work with other files, like finding a file and selecting right arrow?
Here it is: https://nofile.io/f/mPGnUHXWJVJ/Calculation+in+Workflow+Example.alfredworkflow
About commenting, we can't round to decimal using the builtin Alfred calculator since it rounds to the nearest integer. So, the trick for the first version is to multiply the result by 100 so we move the 2 decimals out and then round the value and divide back by 100.
round(({query}+({query}/0.971))*100)/100
For the second version, there's a builtin function in python to round a value and there's a second argument to specify the precision that we want, so 2 in this case