@saadiah_ghazali, I have added 2 lines where the first line sums up the total and the second line flags the same if the sum does not reach 100%.
So now, this is what you see while collecting data.
Data entry screen as seen in Enketo: when the total is less than 100%
Data entry screen as seen in Enketo: when the total is exactly 100%
Reference xlsform:
Cumulative Percentage 100.xlsx (11.7 KB)