If 40% of a number is added to 960, the result is the same number. Find 40% of that number.

Correct option is C

Given:
40% of a number is added to 960, and the result is the same number.

Solution:

Let the number be x.

x × $$\frac{40}{100}$$+ 960 = x

0.4x + 960 = x

960 = x − 0.40x

960 = 0.60x

x = $$\frac{960}{0.60}$$​​

x = 1600

The number is 1600.

Now, find 40% of x:

= $$0.40 \times 1600$$​

= 640

So, 40% of the number is 640.

Thus, the correct answer is (c).