Formula to calculate percent of unit to assing resources

Please be reminded that:

1. Resource quantity and effort are not the same.
2. Leveling for effort is not the same as leveling for resource quantity and can yield unfeasible results.

3. The need for separate fields for resource quantity and effort is not just a matter of convenience it is also a matter of getting reliable resource overload visibility and resource leveling.

I do not use MSP but always look to understand the basics of it.  Try the following.

Percent (%) Allocation fields

Good Luck