Percentages are the absolute foundation of arithmetic. Understanding percentage changes, successive changes, and rapid fraction conversions (e.g., 16.66% = 1/6) is the key to solving questions under 30 seconds without long decimal calculations.
Highly tested in SSC CGL, Banking Prelims (Simplification & D.I.), Railways NTPC, and Police Sub-Inspector exams.
Confusing base values: Calculating increase/decrease on the wrong initial value.
Doing long multiplication instead of multiplying by simplified fractions.
Successive changes mistake: Adding percentages directly instead of using the successive change formula (a + b + ab/100).
This will pre-configure your **Quantitative Aptitude Diagnostic Test**. You will bypass selection screens and land directly on the start screen to begin a 40-question subject-level diagnostic test.