Profit, Loss, Discount & Compound Interest: The Fractional Multiplier Technique
Calculate complex successive discounts, dishonest shopkeeper problems, and CI vs SI difference questions in under 45 seconds.
- Use decimal multiplying factors: 20% profit = multiply by 1.2; 15% discount = multiply by 0.85.
- 2-Year CI - SI Difference = P(R/100)²; 3-Year Difference = P(R/100)² × (3 + R/100).
- Treat dishonest seller problems using straightforward Cost Price to Selling Price ratios.
Fractional Multipliers in Commercial Arithmetic
Commercial mathematics questions are simple ratio transformations. Thinking in multipliers eliminates multi-step percentage expansions and accelerates solving speed.
Turn these study strategies into an automated daily study plan
SmartRank organizes your exam syllabus into bite-sized daily milestones, tracks spaced repetition reviews, and tests you with authentic 5-year solved papers and full-length mocks.
Recommended Reading
View all 47 guidesSSC CGL Tier-1 Quantitative Aptitude: The Blueprint for 45+ Marks in 25 Minutes
Master Vedic calculation shortcuts, arithmetic ratios, and geometric theorems to solve 25 high-difficulty Quant questions within 22 minutes.
Mastering High-Level Reasoning Puzzles for SBI PO & IBPS PO Mains
Step-by-step methodology to crack multi-variable seating arrangements, box puzzles, and floor-flat combinations without getting stuck.
RRB NTPC & Group D: How to Score 90%+ in General Science & Static GK
Master high-frequency NCERT Class 9-10 Physics, Chemistry, and Biology questions to secure top ranks in Railway recruitment exams.