A reciprocal of a fraction is obtained by inverting it upside down.

Explanation

(i) `7 / 3.5 = (7**10)/35 = 70/35 = 2`

(ii) `36/0.2 = (36**10)/2 = 360/2 = 180`

(iii)`3.25/0.5 = (325**10)/(5**100) = 65/10 = 6.5`

Similarly, we can solve rest of the parts of this question.