Question

When 30 is subtracted from a number, the result is 80% of the number. Find the number?
1. 120
2. 110
3. 150
4. 80

Answer 1

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.