A number when increased by 50%, gives 2580. The number is:

Correct option is C

Given:

When increased by 50%, the number becomes 2580.

Solution:

Let the number be x

So, 

​$$x\times\frac{150}{100}= 2580$$​​

1.5x = 2580

x = $$\frac{2580}{1.5}$$​​

 x = 1720