Question

A number is first decreased by 20% and then increased by 10%. The number so obtained is 12 less than the original number. The original number is:

• A. 200
• B. 100
• C. 400
• D. 80

Answer 1

Answer:

B. 100

Number = A A × (80/100) × (110/100) = A - 12 A × 0.8 × 1.1 = A-12 0.88A = A - 12 12=.12xA ⇒ A = 100