The question seems to be an incomplete or slightly mistyped homework problem. Assuming the goal is to calculate 20% of 30% of 20% of 850 (as is standard for this common problem), here is the solution.
20% of 30% 0f 20% of 850% is:
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Question context
This question is part of 📏 Arithmetic Aptitude within the broader 🧠 Aptitude Mastery subject and appears in the PPSC Punjab Public Service Commission preparation collection. Reviewing the answer together with nearby questions helps reinforce the underlying concept and identify how it may appear in competitive exams.