- 2/5
- 5
- 1/4
- 1/2

Option 1 : 2/5

Win over the concepts of Percentage and get a step ahead with the preparations for Quantitative Aptitude with Testbook.

Given,

⇒ (a/100 × b + b/100 × a) = b

⇒ 2ab/100 = b

⇒ a = 50

Then,

⇒ 20% of b = mb% of 50

⇒ (20/100 × b) = (mb/100 × 50)

⇒ 1/5 = m/2

⇒ m = 2/5
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