CORRECT : Most Indonesians live in Asia. (The majority of Indonesian people live in Asia.)
Most of the Indonesians in this class are Muslims. (Only those in the class.)
It means very nearly. ‘Almost’ is usually followed by a number or quantifier (99%, all). The quantifier can be followed by the phrase “of the,” but not “of” or “the” alone.
INCORRECT: Almost Indonesians eat rice.
CORRECT : Almost all Indonesians eat rice.
INCORRET: Almost of Indonesian students in this class like beef goulash (gulai daging).
CORRECT : Almost all of the Indonesian students in this class like beef goulash.
Difference between Almost and Most
Almost all = a very large percentage (99%)
Almost all is like most but it usually means a bigger number.