Correct Answer - Option 3 : 150

**Given :**

When 30 is subtracted from a number, the result is 80% of the number

**Calculations :**

Let the number be 100x

According to the question

100x - 30 = 80% of 100x

100x - 30 = 80x

⇒ 20x = 30

⇒ x = 3/2

So,

⇒ 100x = 100 × (3/2)

⇒ 150

**∴ Option 3 is the right answer.**