What value should come in the place of question mark (?) in the following equation?

(0.006/?)+ (0.004/0.04) + (0.03/0.3) = 0.3

Correct option is D

(0.006 / ?) + (0.004 / 0.04) + (0.03 / 0.3) = 0.3

0.004 / 0.04 = 0.1
0.03 / 0.3 = 0.1
Equation becomes:

(0.006 / ?) + 0.1 + 0.1 = 0.3
(0.006 / ?) + 0.2 = 0.3
0.006 / ? = 0.1
? = 0.006 / 0.1
? = 0.06