In a streaming exercise, students were asked to choose between two subjects, which was Grade $$A$$ Math or Grade $$B$$ Math. $$80$$\% of the students chose Grade $$A$$ Math, $$35$$\% of the students chose Grade $$B$$ Math and $$10$$\% of the students chose neither subjects. Given that a total of $$75$$ students actually chose both Grade $$A$$ and Grade $$B$$ Math, how many students were involved in the streaming exercise? 
Overseas Competition->Knowledge Point->Word Problem Modules->Solving Problems Involving Fractions and Percentages->Finding the Base