A jacket is marked down 20%, then an additional 10% is taken off the sale price. If the original price was $100, what is the final price?

Successive discounts must be applied ONE AT A TIME (not added together). First discount: 20% off $100 → pay 80% → 0.80 × $100 = $80. Second discount: 10% off $80 → pay 90% → 0.90 × $80 = $72. ASVAB Arithmetic Reasoning tests successive percentages. COMMON ERROR: adding 20% + 10% = 30% off ($70) is WRONG — the second discount applies to the already-reduced price. Strategy: apply each discount sequentially. The final price is $72, not $70.