Question

A number is decreased by 20% then increased by 72 which results into 120% of the original number. Find the original number.

• A. 160
• B. 270
• C. 180
• D. 210

Answer 1

Answer:

C. 180

Let number be X X × (80/100) + 72 = X × (120/100) ⇒ 120X/100 – 80X/100 = 72 ⇒ 40X/100 = 72 ⇒ X = 72 × (100/40) ⇒ X = 180