Each side has own formula, so which side is X
For number 3, it is reciprocal
and for number 4, it is whole number
7/50 = 0.14 therefore In order to write it as a fraction out of 100 you move 2 decimal to the right.
Therefore, the answer for the first box is 14/100
The last box obviously being 0.14
19.18 / 2.8 = 6.85
So answer is D.6.850 h