Needing to figure out rounding up/down

Version 1

    Can anyone tell me how to round a number up or down I am adding a link to a pic of what I am trying to do but here is the basic's I am working on a database for a friend which calculates cooking time for the NuWave oven by entering Pounds and cooking time per pound. What I want it to do is round up or down to nearest pound in pounds field so if like a turkey weighs 15.37 it would round down to 15 if it weighed 15.50 it would round up to 16. thanks in advance for any help given.

     

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