1.

If 40% of (a – b) = 20% of (a + b), then what percentage of a is b?1. 22.22%2. 44.44%3. 55.55%4. 33.33%

Answer» Correct Answer - Option 4 : 33.33%

Calculation:

40% of (a – b) = 20% of (a + b)

⇒ (40 / 100) of (a – b) = (20/100) of (a + b)

⇒ 40 × (a – b) = 20 × (a + b)

⇒ 2(a – b) = (a + b)

⇒ 2a – 2b = a + b

⇒ a = 3b

⇒ a = 3, b = 1

 Required percentage = (1/3) × 100%

= 100/3%

= 33.33%

∴ b is 33.33% of a


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