Rounding Issue in Power Query

Hey there, I'm having a rounding issue, but don't know how to solve that either in excel or power query. Would you take a look into it?  Since we capture the forecast on monthly buckets and deploy into weekly buckets. Given that, we might have some decimal for some weekly forecast. (For example, monthly forecast is 17 units and weekly forecast might be 4.25 for 5-week month). But that's not always the evenly.....But how we can set up the formula to have the forecast in yellow  meeting below two criteria (in between before and after situation), it seems rounding up or rounding down don't work 

 

 

1: Monthly forecast is same 

2: only 1 units difference 

 

Thanks!