Sum by category until date

Digger , what excately you want

 

Only sum by grouping

selpre = CALCULATE(SUM(Base[Percent]) )

 

Year till date, you have to use date table 
selpre = CALCULATE(SUM(Base[Percent]), DATESYTD(Date[Date]))

 

Cumulative sum/running total
selpre = CALCULATE(SUM(Base[Percent]),FILTER(Date,Date[Date]<=max(Date[Date] ) ))

 

Why Time Intelligence Fails - Powerbi 5 Savior Steps for TI :https://youtu.be/OBf0rjpp5Hw
https://amitchandak.medium.com/power-bi-5-key-points-to-make-time-intelligence-successful-bd52912a5bd4
To get the best of the time intelligence function. Make sure you have a date calendar and it has been marked as the date in model view. Also, join it with the date column of your fact/s. Refer :radacad sqlbi My Video Series Appreciate your Kudos.

Digger TRy this Measure:

selpre = CALCULATE(SUM(Base[Percent]),FILTER(All(Base),[Date]<=[Date] ))

NOTE: Make sure Date column is of type Date.