This question was previously asked in

MP Police SI Official Paper 8 (Held on : 10 Sept 2016 Shift 1)

Option 2 : 420

__Shortcut Trick__

{800 × (3/4)} - {900 × (2/10)}

⇒ 600 - 180

⇒ 420

∴ Three Fourth of 800 is 420 greater than Two Tenth of 900.

**Calculation:**

Three Fourth of 800 = 800 × (3/4)

⇒ 600

And, Two Tenth of 900 = 900 × (2/10)

⇒ 180

Now, Difference between 600 & 180 = 600 - 180

⇒ 420

**∴ Three Fourth of 800 is 420 greater than Two Tenth of 900.**